I find I am enjoying the syncing features of Safari (and iOS), and it's much less resource intensive on my 2019 MacBook Pro. Also, Safari seems to be the most fiddly when it comes to websites (either because it's stricter in some cases or has strange bugs in others), so I find I am catching more issues for web dev by using it.
Right on with safari not being used by webdevs. Safari is still my browser of choice when I want to hand someone my laptop for some purpose (like ordering food) and not have them complain about my tree style tabs. Some websites they clearly don’t test at all with safari. Big client websites too like tacobell.com, no safari testing at all. Menu images rendered with extra inch wide margins for some reason along with the usual broken fonts.
Weird, next week will complete 21 years of my exclusively using Safari on the desktop, and I’ve yet to notice anything like this. Admittedly I’m not ordering from Taco Bell, but sites being unusably broken is simply a non-issue for me.