In my opinion you must inform your users about this as this can hardly impact the cluster operations after upgrading to Nautilus.
I agree with this assumption. The one should at least be warn before and upgrade.
I'm facing the same issue with 50+ OSDs and have no idea how to sort it out
I don't have another cluster to play with and found not much info how correctly destroy all OSDs on single node, wipe all disks (as well as nvm dedicated got db/wal) and recreate OSDs with same IDs without too much rebalance
Could PVE team make step-by-step manual for this common case (when there are several OSDs within the node and dedicated NVM (parted with 1GB size by PVE 5.4 OSD creation function) ?
Thanks in advance