[e1ven]

That's not a tradeoff I'm comfortable with, "even" in pre-release software.

I'm not accusing you of this, but in other cases I've seen proponents of something say "This isn't a big deal, it's just starting out". Then, when people continue to complain a year from now, the defenders say "This isn't a big deal, it's always done this."

Vivaldi looks interesting, but I'd wager that there's a decent overlap between the Power Users they're after, and the group that values their privacy the most.

[LLWM]

Privacy has nothing to do with it. If the software is not yet ready, users are expected to encounter serious bugs. Your QA department is paid to help provide you with information to diagnose and troubleshoot those bugs, but users aren't, so you need to collect that automatically.