[ehsankia]

That comment you link is from 2019, and Google has made many substantial changes to MV3 since in response to the feedback. It obviously still doesn't give as much power as WebRequest API, but they still addressed many complaints and increased a lot of the limits.

[ayushnix]

The EFF article is pretty recent and it doesn't look good either. I haven't come across ongoing work for a port of uBO to MV3. If there isn't, that says a lot as well.

Whatever MV3 may offer, I for one do not want adblockers to be compromised. If anything, they should be more powerful rather than less. Hypothetically and optimistically speaking, even if a MV3 port of uBO offers 80% of the current functionally, it would still be detrimental for browsing the "modern" web.