pretty self explanatory, would be very usefull like if you decide to go offroading you can just load the gui like specified for offroading (with that tilt angles and stuff) or if you wanna race you just load that profile, would skip a lot of time with setting up the gui if you wanna do something else. (extra coolness if you could make a keybind to switch between those) and yea you can just hide it with alt+u but you get the point
I think the best solution would be different selectable profiles for the UI apps. You already have something like that based on gamemode (time trials, bus routes).
I actually like this idea. Like most times when I am making mods, my screen is loaded with TONS of telemetry and data... but when I was to just drive around... my only quick option is to just hide everything on the screen (what is it... Ctrl+U or something?) So something like this where I could setup a Dev profile and a standard profile for UI apps would be awesome!