I would use it since it's the native browser but last I checked it didn't have any proper ad blockers due to apple shenanigans. I would consider swapping back if I could use ublock origin.
I use Adguard with Safari 13, which has a bit of a clunky startup but doesn't seem to affect performance once everything is running & does a decent enough job of blocking trackers/ads.
This is the one reason I still use Firefox. They care less about privacy, but the inability of Safari to have a proper ad blocker is a deal-breaker.