> And the trick is to replace like-for-like unless the size isn't really manufactured anymore
Which is ridiculous. "Don't upgrade or become rich, these are your two choices".
> (which still doesn't have a journal for raid5/6, so you're stuck with an inefficient raid1 if you don't want to risk parity corruption that's quite hard to detect until it bites you on the junk)
Said inefficiency *still* costs considerably less than upgrading all the drives at once to be able to use ZFS.
> The only filesystems I know that actually support mixed-size drives
Yes, it's a problem that there are so few options.
Hammer2 will *eventually* be a contender but the relevant features aren't ready for this generation of it.
