Yes, I think it is worth it. For roughly the cost of one premium race at a local track you get the opportunity to see all of the Whelen Modified series races (there are others, of course, but my focus is the modifieds). Now, the coverage isn't outstanding; the commentators, for example, are often talking about action that the camera isn't showing), and they don't seem to have replays. But it is, in my opinion, worth $36.00 for the whole year.
It was especially useful in February because they showed a lot of New Symrna racing.
For reference, the NBC Gold Pass is being phased out in 2021...so you can still get it for the rest of the year. As for 2022, NBC is moving all Gold Pass content to the new NBC Peacock Streaming service, which is $4.99 a month.
I'd love to see the old Speedvison resurface as a streaming service. That I'd pay for.