On-disk format robustness requirements for new filesystems

As for "That's the only way to get the average quality up.", who cares? Maybe it helps Huawei, or maybe not, but making EROFS better doesn't make Linux better for all the users out there who aren't running EROFS. This can work for replacing core parts or even primary filesystems like EXT2 to EXT3 to EXT4, but increasing the average quality by insisting that new filesystems and drivers be better then the ones that are used by most users does little service to most users.

Yes, it's a volunteer system. But if you're concerned about Linux filesystem quality, I'm sure they'll take patches or at least bug reports for existing filesystems. You can push for better quality in core features without taking it out on the new features.