Even this will take time to implement. Lifting sanctions doesn't overcome the fact that Russia will have to go back to a peacetime economy, which will 100% result in a recession as the military spending stops.
Even the USA couldn't avoid this, Britain couldn't avoid this, Germany couldn't, Japan couldn't, Soviet Union couldn't.
Right, and something people aren't accounting for is that there are multiple factors at play...
1) Lifting sanctions does not mean that western companies are going to suddenly embrace Russia and re-introduce themselves and invest again in Russia. Let's remember - sanctions didn't cause all those western companies to divest all their Russian interests - public pressure and bad press coverage did. At best, if a deal is agreed most western companies would take a "wait and see" approach.
2) Major investments - when it comes to major industrial, electronics, or petrochemical companies, the investment is huge and takes years to ramp up. This is something most people misunderstand about Trump and his tariffs... It would take years to build factories and re-staff them in the U.S. - and that's in the U.S. - where it's highly unlikely the U.S. government would seize the assets of many western companies who either sold off their assets at a loss - or just left - or had their assets seized by the Russian government and re-allocated or auctioned off.
3) The "Brain-Drain." Quite a few Russians emigrated from Russia and they aren't going back - either for fear of retribution or wrose fear of being conscripted and sent to the front to die. This will take a long time, and likely if relations were "normalized" there are probably quite a few Russians who would flee and leave and "wait and see".
4) Russia is a dodgy place with a dodgy justice system. Western business people will be very careful of actually travelling to Russia or agreeing to work there. Some of them just get thrown in prison as political prisoners. Dunno about you, but I'd be very reluctant to even travel there. I don't want to end up in a fecking Gulag for years, accused of being a "spy".
5) All of these hinge upon a cease-fire or peace that can be trusted. Trust is very hard to rebuild.
6) The transition to a "peacetime economy" will not happen suddenly - unless the Russians are really going to roll the dice. They have expended (read this as "got fecking blown up the Ukranians") a ton of military equipment - ships, tanks, helicopters, fighter bombers, APCs, munitions, etc. Some conservative estimates are that they've expended (again .... lost) almost 1/3 of their conventional forces. It is probably higher. To just fractionally replenish that, they will have to retain this war-time economy for awhile. To put this in perspective, conventionally (non-nuclear) - they actually need to rebuild a conventional deterrent. Not NATO, not the UK, not France, not Poland, not even the Baltics. The Russians do. The Russians just got their ass handed to them by Ukraine WORSE than the U.S. did in Vietnam, Afganistan, Iraq and Korea wars COMBINED. They've lost more men, had higher casualty rates, and have their conventional force structure decimated worse than the U.S. in all those conflicts combined and they did it in 3 short years. This is not a country you go to on a bended knee. The Russians can't start a second or third front, conventionally, against NATO. Unless NATO collapses or the Russians use nukes.
7) Post-war WW2 investment and economic shift isn't totally comparable, in some ways. Post WW2 - the U.S. was able to do something unheard of in history - pivot to rebuilding the domestic economy, fund the Marshall Plan to rebuild Europe - despite colonialism falling for Britain, Spain, Portugal, Belgium, etc., the U.S. occupied and rebuilt Japan, rebuilt W. Germany, ramped up military spending and eventually fought the cold wars in Korea, Vietnam, etc. My goodness - even South Korea evolved into an economic powerhouse during this time. Russia really, simply can't do this. The closest comparison is indeed ... the Soviet Union. It totally collapsed - and now Poland, Lithuania, Estonia, Czechia, Croatia, Slovakia, Slovenia, Hungary, Bulgaria, Armenia and almost every former USSR country is better off than Russia. Who is worse off? Belarus, Moldova, Latvia maybe...? Basically anyone who stayed close to Russia.
8) That's the point, to everyone in this thread thinks that Russia is so strong. They really aren't. Who has been better off siding with the Russians since WW2? Certainly not the Russian people. China - well it's debatable - but didn't they kind of go their own path? Serbia - we can talk about that all day, but... Cuba? Nicaragua? Angola?
9) So, if you really think about it, the Russians are on their ass, and the problem is ... Trump. For some bizarre reason, he thinks Russia and Putin are so great. That's the problem right now.