In finance, where non-comptetes are regularly enforced, the answers are typically 1) garden leave [1] and 2) generally not, it's a built-in expectation.
One big thing that makes it not as good as it sounds is that it's just your salary. In the industry, that can easily be less than half of your total compensation with bonus. Not that that's anything to sneeze at, but it certainly adds to the opportunity cost of switching roles.
It's not unheard of elsewhere, but it certainly isn't common for engineers and line level managers. 12 mo is longer than average probably, but for an exec role or a key position it's not uncommon to get a severance term that includes pay for non-compete months.
Not in Finance, tech. No garden leaves. I'm a dev, fortunately, the non-compete does not cover programming or tech as a whole. I can't work in Blockchain and Fintech, which is the focus of my startup.
[1] https://en.m.wikipedia.org/wiki/Garden_leave