>There's a reason all the major browsers are kind of on-board with this, just like there's a reason it never got updated much beyond XSLT 1. If XSLT would be proposed today, adding it to browsers would be a complete non-starter.
If HTML didn't exist and was proposed today (please forgive the forced hypothetical) it would be a non-starter. Every tech-startup would instead want you to use their dedicated app. We rarely create shared standards or protocols anymore. We should at least keep the ones we have.
XSLT is not going away. You can still use it no matter what happens (and it's far from certain something will happen). Browsers are still built on open standards. It just doesn't need to be bundled in every browser by default, similar to BMP as mentioned in the article.
If HTML didn't exist and was proposed today (please forgive the forced hypothetical) it would be a non-starter. Every tech-startup would instead want you to use their dedicated app. We rarely create shared standards or protocols anymore. We should at least keep the ones we have.