Earlier quoted context omitted.
This is a rediculous justification. Websites should not be coded to a whitelist of browsers.
Biased reply - I work for Google. It depends on what you choose as your choice of technology, if you choose web components then you really can only really offer that same experience to users that have a browser that supports that API natively (without polyfills) which old Edge did not do. My understanding of this situation with yt was that our server side detection code was wrong based on an update in edge (or our UA…
Developers care a lot more about this ‘experience’ than users do.
Yes it’s fun to play with the new shiny, but users don’t care.
User experience is an excuse, it’s double-talk.