[gwern]

That's a pretty major deal breaker for OP to leave out of his post touting it as something to build everything in your site on (especially for a tech blog)! Does it at least have a polyfill story? I see no mention of how to make it work on, uh, the other 15% of browsers worldwide, CanIUse is telling me.

[internetter]

If you use it in a browser that doesn't support view transitions, the pages just don't animate. no harm no fowl