[ceph-users] Reef - what happened to OSD spec?

We upgraded to Reef from Quincy, all went smoothly (thanks Ceph developers!) When adding OSDs, the process seems to have changed, the docs no longer mention OSD spec, and giving it a try it fails when it bumps into the root drive (which has an active LVM). I expect I can add a filter to avoid it. But is using the OSD spec ( https://docs.ceph.com/en/octopus/cephadm/drivegroups/) approach now deprecated? Is the web-interface now the preferred way? thanks.