It would be best to make the switch today. That has the dual benefit of a) Showing Google that they will lose users, and maybe they will change their mind (again), and b) Show every website that they do need to put actual effort into supporting and testing against Firefox.
It's been easily avoided for years now despite alarmists saying ad block would stop working as far back as 2020. I don't even have an ad blocker installed on Vivaldi and the built in blocking has worked just fine, even the other day when people started having issues with YouTube V just kept doing its job.
I'll believe it when I see it, and the day it happens I'll switch to FF. Until then I'm not going to reduce the user experience with this armchair virtue signalling that you all pretend is making a difference.
Chromium isn't Chrome... And they work to keep the worst of what googie tries to force into the core chromium project from Chrome out of their implementation. One of the benefits of chromium itself being open source.