At first I resisted every change. What good is VS Code when I have Vim? Why would I learn TypeScript when vanilla JS has "worked" for me for so long? What's a Webpack config?
Once I began using the tools that my coworkers recommended, I started treading water and even swimming with purpose in the ocean of Web UI technology. I still have a lot to learn, but I probably would have kept on avoiding this area if my situation hadn't forced me into it. Letting my guard down and following the trends in my group helped a lot in this case.
The best lessons I learned during that period are that learning can't kill me and using good tools doesn't make you a bad engineer.