Brave said they’ll keep some select MV2 extensions, though that remains to be seen. Especially if it causes too much maintenance headache with upstream chromium. Also it seems that Brave now distributes these select MV2 extensions. So I’m not sure if they have forked them, or if they just repackage upstream.

I believe their adblock is built in to the browser and not an extension, so it can be more effective than the limited extensions.

Brave has its own downsides too, but at least the browser seems pretty effective at blocking ads and tracking junk.

Brave's adblock isn't as powerful as ublock.