The UA CRJ-500 refit has 2 cabins and is a step up from "very basic" https://hub.united.com/united-region...641053393.html

I have not had the pleasure, yet

Im more curious as to when/if Air Canada will install IFE screens on their second hand CRJ9s and the last batch they received... I had the (un)pleasure of flying one of the ex-delta on YVR-SAN last year

I had one from IAH. It was....annoying

Anyone know where the Rouge refurbishments took place? Two mainline A321's are at YRQ. Maintenance is done in YRQ but is it possible that the rumoured A321 refurbishments have started on the mainline A321's?

I wonder if the 3 new 787s will get the older variant of DreamCabin (on the Boeings), the newer variant (A330 product), or something completely new. Probably not the latter, but one can only imagine…

same cabin as all the other 787s. One is flying already.

Aren't the 32x supposed to be completely retired?

Surprised that the E75 and CR9 (which went through a mini update) a while back are all using legacy IFE.

The 321s were never slated for retirement. They'll be around especially with the purchase of the NX (expect more orders imo).
They operate 2 versions of the 320; the -211 and -214. The -214s aren't getting retired anytime soon since they're 100% part commonality with the 321 (engines being the main thing). The -211s are a surprise to see come back from storage (for Jetz mainly).

As for the CRJ, they haven't been updated other than the addition of seats in the original -705s. Tails 717-721 have their original interiors and 722-730 are pretty much new. No plans as of yet for a new interior.
Same can be said for the Embraers. Express has the issue of staffing which prevents a long term fleet plan as of now,

The E75 interiors are shot and need to go. Flew YYZ-BOS a few times this year in J and seats are dirty (pretty gross to the point where I change into a hoodie for the flight so back of my head doesn't make physical contact with the headrest) with saggy cushions and seem to slowly recline of their own volition.

How stupid to use an inferior PY product when they have been installing the new seat on the 7M8/A220/A330 for, what, 5 years now?

Is that confirmed from AC or personal experience? I had heard the J seats would use foam instead of inflatable seats on these 3, but otherwise no significant changes.

Changing the seats to a totally different model may require new certification of the cabin, and for 3 planes it may be easier to maintain commonality.

Common problem. It seems like the brake on the recline just wears out over time, and it's not specific to AC. I've had this problem on numerous DL flights (same seats) and a few on AA or UA too. Once got 5K SkyMiles out of it when I wrote in to DL about what a shame it was they weren't doing anything about the issue (I think I had the problem on 4 segments in a month, all on different aircraft).
Sadly, I can't think of any newer and better E75 J cabins I've seen on other carriers that might serve as wla model. But I'm sure there's something out there

I for one, would like to see movable armrests in PY (premium economy) as part of the next refresh.

It's annoying to sit in PY with non-moveable armrests, especially when there is an empty seat next to you. Can't lie across, can't get even more comfortable. Sometimes I'd rather be in Y with empty seats rather than in PY.

I have mixed opinions on this. On one hand I agree with exactly what you said. On the other hand, making the armrest movable means that one could potentially spill over to the seat nearby.