I still use Safari on macOS. It seems to retain great performance with great battery life.
Off topic:
What would be cool is if Apple released Safari for Windows (again) and Linux. Ok, probably not for Linux, since Apple doesn’t work well with the desired licensing schemes and since Apple isn’t capable of working with the diversity on Linux to release an end user application.
Safari on Windows and Linux may be probable (not even possible) only in an alternate universe, since Apple focuses on OS support for its applications in (roughly) this order: iOS, iPadOS, macOS, tvOS/homeOS and miscellaneous (this includes Android and Windows). Anything outside iOS seems to get really smaller budgets, smaller teams and very little attention.
Additionally, there is no money in Safari on other platforms, unless Apple does come up with the oft rumored Apple search engine and expands its advertising ambitions even more (considering how poorly Siri has been improving over time, any such search engine would be better not being developed or released at all).