Quebec's Separatist party has complete electoral dominance (except for Montreal, but Montreal is the least Quebec part of Quebec) and has the ability to force the government's hand on most things.
If the Eastern Big City Party loses the next election as is projected (and the Bloc correspondingly loses all of its power) they'll be back.
Only voters who are 65+ are split on soverignity. Every other age demographic overwhelmingly supports remaining in Canada [0]
This can be seen with the CAQ, which has poached most of the PQ's leadership and campaigns almost entirely on Bill 21 and immigration [1], not on "Quebec Libre"
[0] - https://www.politico.com/news/2022/06/17/quebec-francois-leg...
[1] - https://montrealgazette.com/news/local-news/bill-21-groups-f...
[0] - https://policyoptions.irpp.org/fr/magazines/mai-2024/sondage...
Your initial point was not that people chose the PQ over language concerns, but that the party had transitioned. The party has done no such thing. It's doubling down on separatism if anything. It's crazy.
The whole Quebec movement is basically dead in the water now.
An entire generation of Canadians didn't exist or don't remember that.
I'd argue the GWOT, the Great Recession, and COVID have had a stronger impact on modern (2020s) Canadian politics and discourse than the Quebec Independence Movement.