I agree, but I do need to keep a chromium browser around for the odd times that: my webcam decides to flicker uncontrollably during a meeting, a website just happens to put JS that runs terribly on Firefox in the hot path and it slows to a crawl, or a new feature is being demonstrated with Chrome only support.
Beats ads, as far as I'm concerned, but I can't help but feel like your average user wouldn't agree.
I worked for Mozilla for 25 years and kept other browsers around the whole time. There's nothing wrong with having other browsers, and nothing technical that prevents it, so do that :D
I can't think of a time I didn't have more than one browser, even in 1995 when I made Netscape my default, I kept Cello around for some things. More browsers are better than fewer, not only for the industry, but for individuals too.
I used to keep a Chrome-based browser installed "just in case." But for about the last 5 years I've simply refused to have it on my machine. It's not needed.
A few years ago I uninstalled all remainders of Chrom(e|ium) from my laptop. Last week I had to get install it again because of a webflasher for a device that would only work on it. It's now gone again, and not missed.