Astro uses a crossfade as the default view transition, as is described in the docs you linked, it doesn't use any blur.

I haven't seen `filter: blur` used for view transitions before, wouldn't personally call it obnoxious, but to each their own.

I think as long as prefers-reduced-motion is respected, its' fair game.

I stand corrected--didn't notice at first. I do prefer the crossfade, admittedly.