Comment by immibis

Although it's sad to see an interesting feature go, they're not wrong about security. It's more important to have a small attack surface if this was maintained by one guy in Nebraska and he doesn't maintain it any more.

No, XSLT isn't required for the open web. Everything you can do with XSLT, you can also do without XSLT. It's interesting technology, but not essential.

Yes, this breaks compatibility with all the 5 websites that use it.