Even then, would they bother, for a run of the mill embezzler or murderer?
There is something to be said for the idea that living in Somalia is sufficient punishment… so the ancillary question for the OP should be “what countries THAT YOU WOULD WANT TO LIVE IN” are safe from extradition".
Some of the tricks to avoid it might not be available to all people, as well, so when researching your options, bear that in mind. For example it’s fairly unlikely I could ever father a child in Brazil (or, well, elsewhere either) short of marrying a local woman and adopting her child (would that count? and of course assuming Brazil had same sex marriage).
My ability to flee to Israel and use the “law of return” is somewhat limited; I have Jewish ancestry but it is on my mother’s grandfather’s side so it doesn’t count. And afterthis well known case, Israel changed its laws regarding extradition of citizens anyway. The “person” involved wound up serving his time in an Israeli prison anyway - which might or might not have been better than a US prison. The story has a lot more details than I heard at the time - what a lovely family (not!!).
Honestly, I think your best bet would be to find a country where there is no explicit extradition treaty, that has a decent standard of living at least if you’re “rich”, get fake papers there, and live modestly because you don’t want to draw attention.