I'm curious. I'm not "frontend", but I do write code that runs in the browser, and write parts of the visualization UI for our products. I do get to determine how we build our products. I've gone with vue/typescript, and that hasn't caused any problem so far. A part of our software has to be able to run everywhere, and that unfortunately still includes IE11, so there I do take care of using a minimal feature set, but I can't remember the last time Safari caused me a problem. What problems does Safari cause?