Have I missed something
Why are we comparing a 5 pot 2.5 with an electric ionic5?
Valid question, but for some the alternative to a DAZA/CZGB is not a DNWA/DNWC but to go electric.
I went through that when I missed the boat on a new DAZA and drove the DNWA. I was about to buy a Polestar when a car of my exact spec came up approved used. There are lots of reasons I can think people go from RS3 to Electric,
Similar performance (Polestar is 4wd 400 bhp)
Some have better interiors (personally I prefer the Polestar interior to the 8Y)
Because it has been done to death by every muppet, loud exhausts with pops and bangs have lost their sparkle, less acceptable these days, bit like smoking and rolling coal in a diesel.
Insurance is similarly stupid these days for either.
The RS3 'scene' has become a bit toxic these days with how a few bad eggs act/drive. Many are done with that and fancy a change and not the next big thing.
The RS3 has always been a bit of a straight line blunt instrument and is more similar to an electric than something like an M2 or Cayman.
I am glad I found my DAZA but many times I sit on long runs more impressed with 40+mpg than its noise or 0-60 time, but that may be because I'm wrong side of 50 but that is not rare either in RS3 owners.