There are so many non-native speakers of english (owing to it being the current international language) I don't even bother correcting grammar anymore in code comments in pull requests anymore. Unless it's like, user facing or something. But anyways, all the better I suppose to focus on content.
Grammar will be fine when browsers and other tools will implement good grammar checking. I don't understand why browser developers don't focus on it. There are some companies like Grammarly solving that issue, but that should be standard feature rather than paid opt-in. I can translate website in Chrome with a single click, but I can't check grammar. And translation is a really hard task, while grammar is pretty much formalized and could be coded without any AI breakthroughs.
I'm not native speaker and my text likely contains a lot of errors. For example I fix spell errors, because browser underlines them instantly, I'd fix grammar errors and may be I would develop some kind of grammar literacy after some time with proper computer assistance.
