As a full stack dev who leans heavily towards the frontend... yes, honestly, some weeks 80% is a realistic number and WOW is it exhausting to fix Webpack or Babel or some random npm package for the nth time. I do feel like I run into issues less often today than I did about five years ago, there are really only a few packages where upgrades are a massive pain. TypeScript makes these upgrades a lot easier.

That being said, I still have way more fun writing TypeScript and React code _when it works_ than I do writing yet another Java API. Might just be personal preference but the amount of fun that I have doing it makes dealing with the tooling hell all the more worth it.