The main reason is that I don't know how to run background programs like pipewire normally.

If you do it via xinitrc, it will work only for one user.

Also I'm not sure that for example vscodium or lightdm
without dbus.

Also DE automounting usb drives

Because Guix has better configuration syntax, it will not function properly without systemd, as I understand it.

I don't want to steal DE's job :)

Soo, if i want to use timeshift i will need polkit,so what about it?

Im already using fork of picom:)

Already seen

Best answer, thx

Just use session manager like lxsession

What about lxqt customization?

Hm

I don't want to autostart all programs by myself, most of DE control autostart and dbus session by it self... Furthermore,DEs are contain settings manager etc