We have reached a middle ground in our organisation (not a tech company, so there is less code and a slower pace). We don't require rewrites, but simply recommend that next time the code be written in a more lenient style. The education aspect is a good lens through which to view the issue also, sometimes resistance to an unfamiliar style is due to a fixed mindset around a known set of language functionality. It could be an opportunity to learn something new which is genuinely useful.