I get that there may be network effects that trap you, and you could be worse off because that means that by prioritising another feature they made one of your personal favorite features worse, but that really doesn't have to do with the technology used and more with what the developer is prioritising.

I can and I do, for as long as it's possible.

The problem is that JS-first fashion infects web shops, and one by one, websites are being rebuilt in "modern ways", rendering them less usable than they were before. Such sites would be easy to avoid if they were the exception, but you can't do that if everyone follows this trend.