I don't disagree with you on this, I worked my whole life in corporate and haven't worked as a OSS maintainer before, though I will _and already did_ reject PRs

I don't disagree with you on this, I worked my whole life in corporate and haven't worked as a OSS maintainer before, though I will _and already did_ reject PRs way less than that, I speak for myself and my team here and it's unrealistic to ship a single PR as complex as this, we usually plan features as tech designs with PRs of no more than 500 LOC, but that doesn't mean we could never have a 20k PR at all. in my experience, those huge PRs are usually the simple ones where most of it is just noise. I did one recently and moved the UI library in one of our old codebases three major versions up to the very latest, although it was 20k lines of changes, all of it is just mechanical chanes, renames, codemod stuff, test fixes, snapshot updates, ...etc. and it's not realistc to split this into multiple smaller PRs as this can bring other complications like having multiple versions of the same UI library in the codebase, which could cause more problems than it fixes, AI helps with that kinda work a lot and I would've never been able to do this migration is such a short time without it. despite that, reviewing it was a UI challenge, not code, with UI libraries, the breaking changes are usually in the UI so you can't see it from the code, and we did have a special process to review it, although on the code side, Github was a nightmare to deal with reviewing this PR, we noticed that github was the bottleneck here since it lays out the code changes without much context and is already hard to navigate and stuggles with huge PRs, the review surface and the developer experince on github was horrible, and that's why I suggested you look for better alternatives, there are a lot out there and all of them are free for OSS so why not try them?