A note on this "is it worth paying for?" thing: I think we've been greatly spoiled for the last several years in general with free internet content but it's not sustainable and a lot of great sites and newspapers are getting wiped out by the squeeze (thanks in large part to Facebook, advertising rates, ad-blocking, etc). I bought a sub to The Athletic in part because I see it as the best way to support professional online writing, and we're basically getting daily content geared towards our teams at the cost of a SI mail subscription.
If you want great sports writing and it has to be free, that's fine, but there's a good chance your favorite will be out of a job sooner than later.