Pretty much the default for Steam Deck keyboard+mouse.

Works surprisingly well, just bind some keyboard shortcuts to the various other buttons and such.

Downside is that my right track pad is polished a little smooth in the middle. I blame the Master of Magic remake.

HODL! (For Steam sale or Humble Bundle)

My Steam Deck has largely replaced my laptop, so there is some overlap, but I wholeheartedly agree with your assessment. If you are carrying a keyboard & external screen to work on spreadsheets with you Steam Deck, you would be happier with a laptop.

I have a 60% Bluetooth keyboard and a relatively compact mouse that I can carry with me, but by that point a compact laptop would be more portable with a larger screen.

Using the on screen keyboard and built-in screen to edit spreadsheets would constitute a crime against humanity. Don’t do it, there’s so much more to live for.

The reason it’s replaced my laptop is that I mostly use my laptop for gaming, and the Steam Deck excels at that. Most places I would use a laptop for something else, I have ready access to surplus keyboards and mice. At my parents there is an old TV with HDMI, and I stashed a basic USB mouse and keyboard there over a decade ago. My Steam Deck and a small hub is all I need.

Because of the need of external devices, I kind of consider the Steam Deck a combination of a handheld and a really portable desktop tower.