The real solution Vivaldi offers to the tabpocalypse has been here for ages: tabs on the side instead of on top! We all have widescreen monitors now, so losing 50 or 100 pixels on the horizontal plane isn't really a big problem. And the tabs then become scrollable downwards, while still keeping their readability. It took me a couple of days to get used to them over on the sidebar, but I could never go back.