This resonates a lot! I've always considered myself a general software engineer (mostly doing algorithms and ML in uni), but then moved to industry and for every project needed to get into web. Over last 10 years I went through php, Java and Node on the backend and jquery/angular/react on the frontend. I understand and appreciate why and how these technologies developed, but it still felt I had to do a lot of re-learning to catch-up with the latest stack and build the similar thing all over again.