>Other Chromium browser vendors have claimed that they will continue to support MV2 based content blockers, later revealing that they were unwilling to support the code once Google removed it.

But Brenden said: >Brave will support uBO and uMatrix so long as Google doesn’t remove underlying V2 code paths (which seem to be needed for Chrome for enterprise support, so should stay in the Chromium open source). Will Google Chrome Web Store really kick them out over V2? We will host if needed.

So it seems like Chrome Enterprise needs V2 code paths so not all Chromium browsers are botched but Chrome Store can kick them off the Store or maybe they will stay as legacy extensions? Time will tell.