A lot of things that have been mentioned like FP and TDD and whatever can bring new perspectives because they force you to break your existing programming patterns, but I also think that is the main benefit, not the paradigm itself. This is also the benefit from (the increasingly contentious) Clean Code. It's basically a bunch of rules that force you to break habits, even though it's easy to conflate that with benefits from the paradigm-change.
It's difficult to improve when you're basically just building the same program over and over. That's what I'll argue is the benefit from switching paradigms; you can't keep doing that, so you're nearly forced to learn new things.
A lot of things that have been mentioned like FP and TDD and whatever can bring new perspectives because they force you to break your existing programming patterns, but I also think that is the main benefit, not the paradigm itself. This is also the benefit from (the increasingly contentious) Clean Code. It's basically a bunch of rules that force you to break habits, even though it's easy to conflate that with benefits from the paradigm-change.
It's difficult to improve when you're basically just building the same program over and over. That's what I'll argue is the benefit from switching paradigms; you can't keep doing that, so you're nearly forced to learn new things.