Agreed, this actually sounds like spot-on for a common use case: you've got your laptop with you, you've been working a while or gaming and you close it as your battery starts to ebb. But a little while later, you realize you need to check your calendar or email for something for your upcoming meeting/date. Open up the laptop, find the info, close it again. You really didn't need 100% poer to read an address, did you?

It's not so great when you change one cpp file and run make.

Can you open up the editor, edit the file, save it, then exit or bg the editor (or go to another window) and type 'make' in 10 seconds or less?

It will harm browsing. Pages typically load within 10 seconds, and people rarely binge-navigate at high rate.