Gosh, I didn’t realize the tabs couldn’t be set to horizontal. That’s a likely deal breaker for a lot of people.
I figured I’d give vertical tabs a chance (I usually keep too many tabs open to see their name anyway, and I understand the rational behind them), but not at all sure I’ll stick with it. Hopefully they’ll add support for horizontal tabs soon.
I’m happy to have it as the default behaviour, as long as it can be easily changed. Similar to Vivaldi I guess.