In addition to what others have said, I prefer more vertical space for webpages. Vertical tabs take up much less space and are, in my opinion, much easier to organize. I also don’t need to see the title bar constant and the favicon is plenty for me to keep track of what’s there.
Grouping helps me keep ideas together. I don’t like to bookmark things I’m only going to need for a few hours/days, so grouping tabs helps me keep them open without them getting in the way.
How does this fragment anything? DLSS and Nvidia’s ray tracing tech have always been exclusive to their own RTX cards. Nothing changes in that respect. Ray tracing, as a whole, isn’t exclusive to Nvidia, but their tech has been.