Summary: Kernel developers need to be nicer, while kernel maintainers need to be smarter.
Sometimes we're all in situations where it just seems that the probability of change is so small that no amount of effort, no matter how little, is worth making. But the kernel is not one of those situations, as incredible achievements like eBPF can get in despite the obvious lack of understanding early on by the kernel maintainers. IMHO the same is true here with bcachefs. This could truly be the future of filesystems, at first integrating everything good about ext4, mdadm, lvm, bcache and zfs. I use all of these and look forward to replacing them all with bcachefs. And the concept of tiered storage in bcachefs could be extended to include proper backup in the filesystem. For example, in addition to foreground_target=nvme and background_target=hdd, we could have things like offsite_target=Box, hotsite_target=AWS, coldsite_target=NAS.
Get on board the hype train!