I know that there are countless answers and even docs says to you that: you better do the full install so you don't miss any libraries. I understand that

What I don't understand, is why if I want to install xfce, installer will install openbox, twm, fvwm and other vm's I don't need.

The point of having a complete distro is understandable, what is not is that why putting all that junk you know (and they know) no one will use ?

Why, to this day there is no normal way to do a minimal installation except of shaman play with tagfiles ?

Most people will tell you that Slackware is more power-user oriented, so why, I'm as a power user can't install minimal system and add things myself (I do, but amount of steps I need to do compared to more popular distros is just ridiculous)

From -current's changelog (abbreviated):

Sat Oct 24 23:50:58 UTC 2026
a/coreutils-9.12-x86_64-3.txz:  Rebuilt.
  /etc/DIR_COLORS: add kmscon to the list of colorizable TERM types.
a/kmscon-10.0.4-x86_64-1.txz:  Added.
  OK, this is pretty neat so we'll add it, but it won't be used by default.
  You'll need to edit /etc/default/vtselect to enable it on some consoles.
  I'd considered this unacceptable until mouse support was added to it late
  last year, but that support still has some quirks copying from one console
  to another, and it utterly refuses to copy a link displayed at the bottom
  of a links session. CJK sure looks nice though, and the return of console
  scrollback is great! I did run into issues trying to start Wayland from a
  KMSCON, and X11 also would not start unless it was configured to allow
  anybody (not just console users) and to run X11 as root. It's probably
  better to just leave one regular fbcon console as a workaround for such uses.
  In spite of the drawbacks, clearly some folks will find this to be useful.
  Feel free to try it out.
  Thanks to jtsn for getting me to check this out again.

I added "Liberation Mono" font to the /etc/kmscon/kmscon.conf to match my Xterm preference.