I think the 80% number is outdated (although most of the energy is still wasted)

F1 engines achieve a peak thermal efficiency above 50 percent, significantly higher than a modern passenger car’s 35 percent thermal efficiency - https://www.motor1.com/news/655596/video-how-f1-engines-make-1000hp/

So more like 65% goes out the tailpipe…

Sometimes it’s not so easy to fire up a GUI, like when you ssh into another machine.

I haven’t tried with this, but maybe it’s easy to host it locally. That’s what I do with the stable diffusion web UI

Everywhere

Is this tabbed user interface what you’re asking for?
https://books.libreoffice.org/en/IG72/IG7212-UserInterfaceVariants.html#toc8