It turned out to be very simple. The paid version is more for people who also do retouching. In many other cases, it is enough to work on material with a lower resolution, and then create a 3dlut file 
No, of course you can buy a studio, but what’s the point?
I like to work only with color. I don’t do retouching and I don’t build static masks.
The 3dlut I get, I can apply it anywhere. I apply it in 3dlut creator - I bought that program a long time ago. But I think that other programs can work with 3dlut.
I know about sliders and feathering. But the shading tool there is a straight diagonal line.
But that’s not the point.
As far as I’m concerned, everyone has something different. A predisposition to something. To some program. I like 3dlut creator more than davinci. But I get good results with davinci. It could be that I would get good results in the Gimp, or in photoshop, regardless of what I like or do not like in those programs.
To me, that’s no way to get excited about any program. But you shouldn’t do it for yourself. In fact, as well as different approaches to working with photos.
Less enthusiasm means less screw-ups in your work).