That's quite a record. Seems like these records are falling everywhere. Liverpool are apparently, to my surprise, the first English club to achieve that too.
Have clubs around Europe just got incredibly weaker? Milan, Porto, Atletico, Real, Barca, etc? I would think so.
100%. I think the UCL will be a little boring in the next couple of years (unless the team you support wins it obviously) due to how far ahead English teams are.