I feel like any park that essentially looks like this still is a 'Studios' park.
What you are essentially looking at in this picture is a bunch of soundstages run by USF Production Group, an entirely separate entity from the theme parks, and then HRRR along with the two Minion show buildings and Fallon on the middle left.
These are occasionally used for actual production, but that has nothing to do with the park. The only time these are used along with the park is during HHN. That's the closest to production that happens here on a regular (i.e. yearly) basis. HHN needs the space, they rent it, rinse, repeat.
But the actual theme park has very little that is for it's original purpose of showing you how film is made which is essentially the definition used to describe any "Studio" themed park, whether it's USF, MGM/DHS, WDSP, or anywhere else. The rides and attractions in USF, with the exception of Horror Makeup and Mummy I guess, could really be put in any park and fit just fine.
To me that's the mark that it no longer is within that original "Studio" theme of the park where there was, as
@Casper Gutman said, an intention to teach in a way. If only there was a word for Entertaining while educating....
Now there is still some things that get filmed there in the actual soundstages which is great, so yes, that is a working studio. The working studio is a separate division within the company though. I could make a very similar argument in the same way that, if the Studio Tour ever goes away, that USH is no longer close to being a "Studio" park under my definition. It's located next to a Studio, but it's more of a park themed after Hollywood Entertainment, which is what I think USF's theme is now more than anything.