> So could we not "renew" some antibiotics by simply not using them for 5 to 10 years?

I'm fairly sure I've come across this idea before. Oh here's an example: https://www.quora.com/What-is-antibiotic-rotation

Seems like the problem is how long it takes to lose the resistance. Probably a few decades rather than a few years. And you'd need all the world to stop, which just isn't going to happen in Asia, Africa, South America where you can just buy a couple of pills from the local pharmacist if that's all you can afford. Not an easy problem to deal with sadly.