2) New stadium because “everyone has one” as already mentioned “Liverpool, Everton, Chelsea, Aston Vila, Newcastle, Leeds… not to forget Real Madrid, Barca, AC/Inter, Dortmund: basically most of the biggest clubs in the premier league and Europe don’t have new stadiums.
Liverpool have built one new stand and are currently extending another, won't be long before they re-do the Kop too you'd assume because it'll look tiny in comparison to the rest there.
Everton are building a new one right now.
Chelsea presented plans for a redevloped Stamford Bridge a few years back.
Villa also presented plans as part of the WC bid and there have been constant rumours of Villa Park having the corners filled.
Newcastle will either expand the Gallowgate end or build a new stadium when the new owners get going.
Leeds have been out of the Prem for years but also presented plans for the WC bid IIRC.
Real are currently massively renovating the Bernabeu.
Barca have plans to massively renovate the Nou Camp.
AC/Inter have just presented plans for a new stadium on the site of the San Siro.
Dortmund had theirs redeveloped in 2006 for the WC there. Interesting you mention them because everywhere else in the Bundesliga is a redevloped or new stadium.
OT is based on foundations built in 1910, the basic low tier is from the 60's with the bowl completed in the early 90's. With the distance between seats being a major issue and the ability to redevelop it to anything remotely compared to the current high-tech new stadiums extremely limited, there'd be little point in renovating OT.
Either you leave it as it is and say 'sod it' to any futureproofing or you do a massive job rebuilding it in which case we might as well rebuild it away from the train lines.
Don't get me wrong, I love OT for what it is, but it's massively outdated now. Any concessions to modern standards would reduce capacity massively to improve leg room and that would cost a bomb, plus redeveloping the South Stand would be a huge amount too. It needs a new roof entirely which may not be possible given the design as well.
Biggest/traditionally biggest teams and rivals in Europe right now.
City - modern stadium (2003 - redeveloped in 2015)
Arsenal - modern stadium (2006)
Spurs - modern stadium (2019)
Liverpool - redevloping
PSG - plans for redevlopment
Bayern - modern stadium (2006)
Dortmund - similar to OT but better suited
Leipzig - modern stadium with redevelopment plans
Real -redeveloping
Atletico - modern stadium (2017)
Barca - plans for redevelopment
Juve - modern stadium (2011)
Inter - plans for new stadium
Milan - plans for new stadium