The react code base is written by me, a backend/infra person and it was the first time I used it. It is a mess and the worst is that all the system tests are super flaky because of weird react DOM stuff.

In that case you’re probably alright with the rewrite. My opinion is to stick to React and rewrite the parts you think are nasty.

That’s only because this can turn into a real rabbit hole in my experience. But at that size maybe it won’t be so bad.

Best of luck!