Content model and 'what' to render for stylable `<select>` elements about html HOT 1 OPEN

To be clear, #10310 was to discuss a specific subset of #9799. What ends up getting rendered is really a function of the appearance property and is already tracked by its own issue over in the CSS WG: w3c/csswg-drafts#10028 & w3c/csswg-drafts#5998.

I think an accessible select will always need to have text-based options, essentially. Not just for accessibility, but also for platforms that opt not to support the custom rendering. When you create a tree that one cannot derive text-based options from (and thus doesn't render anything with appearance:auto instead of appearance:base-select) that should essentially be a non-conforming.

from html.