On my work machine, for example, I have a "space" that's tied to my personal gmail account, so I can check that email if I need to, without worrying about being logged in or out of my work email (which is also a google account). Switching between spaces is just a swipe.
I also spin up a space when I'm working on something, so those proliferating research tabs don't interfere with other steady work, which stay in their own spaces. Then I just delete the space when I'm done.
Splitting tabs into half screen with option+click has been really nice, even though I use magnet and could do the same, it just takes a lot longer.
Pinning the 8 most used websites for my work / workflow is nice, and keeping them separate from personal stuff is nice too.
Clearing all my tabs with one click is nice.
Google Meet pop up window was a nice surprise.
I guess a lot of littles, and a solid enough foundation of just being a normal browser, adds up to a nice experience. + google got a little too excited with ad tracking in the latest chrome which pushed me to switch.