Speaking of outdated software… Not only is mpd old, but also the nodeJS core Upgrade to NodeJS v16 LTS
And well, Buster itself is from 2019.
The current Debian stable version was released back in August – Debian -- News -- Debian 11 "bullseye" released and the Pi version more recently Bullseye - the new version of Raspberry Pi OS - Raspberry Pi
Earlier, this didn’t bother me much, I would just complain about all the outdated software and the scary security implications of running them on an internet connected device.
But now with the whole myVolumio → plugin store link, I will eventually have to go from self built up-to-date software back to stuff from 2019 
I really wish the focus was more on software stability and security first, and new features/bugs later!
But finally, the end of Jessie (released 6 years back) is finally in sight, so I shouldn’t complain too much! 