I honestly don't understand why anyone would refuse to switch from away Chrome. It's not like the other browsers lack functionality or are slow. The only problem they might encounter is some rare incompatibility which is the result of Firefox (and its forks) small market share and web devs not caring enough.
I've never used Chrome as my primary browser and I don't think I missed anything. I started using Opera years before Chrome was even a thing (back when everyone was using IE) and then when the old Opera died, I didn't think even for a second about switching to Chrome and went straight to Firefox. Which could at least be highly customized to bring some Opera exclusive features (eg. mouse gestures, tab grouping) back.