Earlier quoted context omitted.
uBlock should really just instruct users to "switch to firefox for a fast, up-to-date ad-blocking experience"
Yes we can ditch chrome. But what about general population? Now that websites may choose to give incompatiblity prompts to Firefox since it impacts there revenue through ads. They will ask users to switch to chrome. This might affect Firefox in long run. It's market share might drop.
The main reason Chrome is so popular is because tech people have been saying "just use chrome" for forever.
Firefox is taking back that role. It'll take time, but with google becoming such a PII hoarder, it's a change that will likely continue.