I’ve been building websites for 10+ years, and still prefer Safari as my daily browser. I switched over from using Chrome full-time 5 years ago.
Compared to Chrome it’s anecdotally faster, objectively more power-efficient, and on par with Firefox for privacy.
I don’t know why you think Apple’s uninterested in making a “competitive” browser. It’s been years since Safari didn’t support something I needed it to do, and I’d consider myself a power user.