A few months ago I tried to go back to Firefox and used containers a lot. It works fine, but sometimes I'd pick the wrong container, defeating the point of using containers (eg: using Google Search for personal stuff while logged in to a work Google Account).

Containers are useful and we can do interesting things with them (eg: temporary containers), but they don't replace profiles. With a profile I don't have to mix personal bookmarks with work bookmarks, I can use different extensions/settings, a different theme so I don't use the wrong profile by mistake, etc.