I answered this in another comment, but you were actually the first one to ask me this so let me say it again out of respect!Glad she is happy with her car, we both love ours.
Dumb question; why would you consider upgrading hers if you have a '22 plaid? Somewhat generalizing but my wife doesn't care about acceleration and keeps her LR in chill mode all the time.
Resale is hot in TO right now? It's terrible in Edmonton, I was ready to unload my MYP for an S Plaid but the hit is just way too big.
In any case, after driving both I can't say the MYP is miles ahead of the MYLR and definitely not worth the hit in selling a '23 LR for the P. The "performance" brakes are barely an upgrade at all:
Tesla Model Y Performance Has Smaller Rear Brake Calipers With Fake Covers
The manufacturer switched suppliers last year, so the rear brakes aren’t Brembo any more, even though they might appear the same.insideevs.com
Just my 2 cents though.
My wife is like your wife. She has zero interest in anything but chill mode. We did a one second near full acceleration in the plaid, she grabbed her chest and asked me… do you like that?! Hey what are we talking about here?! Kidding aside I told her yes I enjoy the acceleration but it’s a little much if we are hungry or feeling a little lightheaded in between meals. The acceleration is ferocious and scary. The performance of the model Y, while I’ve never tried it. I’m sure it’s just a little edger? Probably slower than my 2.7s 10.8 1/4 “old” performance model S, but also, I’m sure an absolute blast to drive.