While true, it can fill the drive replacement with data spread from way more number of drives than raid can, so the point I was trying to make is that a second failure due to resilvering cam be greatly mitigated by using a Ceph setup.

Just rebuilt onto Ceph and it’s a game changer. Drive fails? Who cares, replace it with a bigger drive and go about your day. If total drive count is large enough, and depends if using EC or replication, it could mean pulling data from tons of drives instead of a handful.