The Steam Deck is a great piece of techonolgy, and very versatile thanks to the fact that its easy to switch to desktop mode. However the default configuration is rather limited, and there are a set of customizations I had to apply to make it fit my workflows.
When taking notes I prefer to launch a note-taking application, write a line, or two, then close the application. Having used Vimwiki for a couple of days, I had to create a desktop entry wrapper around it, just to avoid the "Open Terminal first", step.
Frustrated by some weird default keyboard backlight timeout on your laptop under Linux? I know how you feel, had the same frustration with my Dell laptop until I found a workaround.