Maybe, maybe not. It's getting dangerously close to the modern day IE, where some websites just don't work right and everyone has to do arcane shit to make their websites cross platform.
It's also a closed source browser developed by Apple. It's not competing with Firefox. Everyone contemplating switching to safari over Firefox are not being honest - they're not even on the same playing field.
The only way you can possibly view Safari as "the modern day IE" is if you consider the authoritative source for What Features Should Be Supported to be Chrome.
You should probably think about that for a bit, in light of why IE was IE back in the day.
> It's getting dangerously close to the modern day I.E.
This line gets thrown around a lot, but if you look at the supported features, Safari is honestly pretty up-to-date on the actual ratified web standards.
What it doesn't tend to do is implement a bunch of the (often ad-tech focused) drafts Google keeps trying to push through the standards committee