Alright, so after a few days I can say 11.4 is pretty stable!
It's so good to finally be able to use spotlight to do math again...
It seems pretty rock solid to me. I've got zero complaints so far. As I've said on my first post-11.4-migration post, the resources usage has dropped considerably. So it's not only faster, it's finally stable! I don't miss Mojave anymore, after 2 years struggling with Catalina, I can finally let Mojave go
If you haven't yet and your workflow allows you to, go to 11.4!
It's so good in here, I hope I can hold on migrating to Monterey (Catalina is too fresh in my memory...)