There’s a dearth of options, honestly. I was tempted to write “none of the above” for the chat app section.

They’ve moved on to Proxmox and NixOS for self hosting/NAS purposes. I don’t think OMV is being intentionally ignored, they just don’t use it anymore themselves.

Only thing I’m missing is the ability to only download a subset of videos from a channel. There is a workaround by making a playlist but I believe that requires a Google account.

No reason not to. Old reputations die hard, but it’s been many many years since I’ve had an issue.

I like also that btrfs is a lot more flexible than ZFS which is pretty strict about the size and number of disks, whereas you can upgrade a btrfs array ad hoc.

I’ll add to avoid RAID5/6 as that is still not considered safe, but you mentioned RAID1 which has no issues.

Yes, HDMI 2.1 is included with RTX 30 and 40 series GPUs. Unless you mean Nouveau, which actually has better support with newer GPUs, so yes.