Earlier quoted context omitted.
I tried Vivaldi a while ago and, while I really liked it, it didn't justify not being open-source. I'm not one of the OSS elitists, but the browser, like the OS, is just one of those basic things that I want full control over.
I'm a huge fan of FOSS, but do you really think that you have full control over any modern piece of software? I think that underestimates how many people actually work on such a project and how many new updates we're getting on a daily basis. Nobody is more than %-wise controlling that stuff anymore. And this % is based on regular financial(!) investment in developer-hours but not in what software you use. PS: I just…
It's very important to me that emacs is open source not because I review every single commit (I don't) but because it means that I can commit a lot of time tweaking and learning the ins and outs of the editor without worrying about having to switch to a different one a few years from now when the original devs get acqui-hired by Facebook and they stop working on their project.