It's helped me immensely, however the projects I work on get millions of hits a day (I’m in publishing/adtech). More eyeballs means more chances for an edge cas

It's helped me immensely, however the projects I work on get millions of hits a day (I’m in publishing/adtech). More eyeballs means more chances for an edge case to pop up. It's been worth it alone to catch undefined errors at compile time. I'm also on a team of 5+ front end engineers, though and use other team’s internal libraries often, which is probably why it's made a difference. If it seems more hassle then it's worth for what you're working on, the rest of your team isn't bothered, and your clients are happy you don't have to worry too much. I still throw in vanilla JS on other smaller projects every once in a while for those reasons.