We are currently rewriting out frontend app, so can't talk about long term experience. I don't see much of a benefit of having everything in a single file vs.

We are currently rewriting out frontend app, so can't talk about long term experience. I don't see much of a benefit of having everything in a single file vs. many. We are going to split them up, as soon as they become unwieldy and people ending up spending too much time reading code not relevant for the task at hand. What I do see a lot of benefit in, is having everything in one language (Typescript in our case) instead of three and all the IDE capabilities like autocomplete, linting, refactoring, etc. that come with it. But to be fair, I haven't done frontend in a while, so I'm not up to date what the state of the art integrations for html/css/js look like in comparison.