[nbp]

“[…] by virtue of the combined share of Chromium-based browsers, will be a de facto standard for browser […]” — i.e. The web is dead.

Please consider switching to a non-Chromium-based browser if you want it back.

[zamadatix]

It's not really about whether it's Chromium based or not it's about what the fork does once it's disabled in Chromium.

[shadowgovt]

If "the web" in this case means "several incompatible standards I have to adopt to work on all likely users' browsers," I won't miss that web.

If "the web" means "There are a few standards different implementations conform to, and if I adopt those standards I'm compatible with those implementations," I don't see it dead in the adoption of MV3.