Just updated to e3 20200502:
Everything is working fine.
May thanks for your outstanding performance.
Coming from the latest “upgradable” version of e3, restore of bookmarks, webradios, mpd.db and lirc config files was working perfectly. I simply had to install IR tools (pacman -S lirc lirc-utils) and adopt /boot/config.txt (dtoverlay=gpio-ir,gpio_pin=NN) first. Before restoring mpd.db it is wise to mount the music repositories on the same place as before

irexec autostart bug is still present in the latest archlinux package but is easy to fix (
https://sourceforge.net/p/lirc/tickets/156/)
Usage of ~/.ssh/authorized_keys is working without any modification.
No problems with HW volume control and DSD (thanks rern) with my tricky Pro-Ject DAC Box S2+.
Will do test with my other DACS, DragonFly RED and Pro-Ject pre box S2, soon.
Greetings from slowly awaking Austria