We are all creatures of habit. Even if something is not good in our current experience we often say "yeah, it's bad, but it's a bad I know. Who knows what will be bad in the other software?" - which shows the incredible high threshold this shitty decision by Google has reached for people to seriously consider going back to Firefox (seriously, as in "I've seen more posts about switching (back) to Firefox than in the last 2 or 3 years together")
