I'm not saying what's "the correct play" or not, I'm refuting the claim all Chromium-based browsers are immediately affected, because I know of at least one that will keep V2 support.

But I will keep using Vivaldi. It will take me the same time to migrate to Firefox regardless if I do it today or a year from now when Vivaldi drops V2 support. I have nothing to gain by migrating sooner, but potentially much to gain by waiting.

• Vivaldi might decide to keep support indefinitely,
• Vivaldi might decide to update the built-in ad blocker to use UBlock Origin tech,
• Google might backtrack the decision (hah!),
• a whole different browser I want to try might come out in the meantime and I'd have to migrate twice,
• Firefox might die after losing Google funding due to the monopoly ruling.
• I will build a new PC in a year and it will be a good time for a software refresh,
• Or, the most likely, none of this will happen, and I will migrate to Firefox then, if that's the best move at the time.

Not for everyone. For me it's unusable since I rely on stuff ff never implemented (using bluetooth from a web page to configure some of my home appliances, grab api keys for them, stuff like that). Also I'm not too thrilled that it laks any kind of official PWA or Chromecast support. Not to mention they still have some ugly bugs when rendering some gradients.

And besides this, I used to love everything Mozilla did, but at one point I grew to hate how they left ff to stagnate which made me switch.

I still reconsider it from time to time, but I always get disappointed by how little things have changed and how much even more things seem to be missing/buggy since the last time.