I'm on the fence. I spent a ton of money on an ultimate license forever ago and never used it, ran with Roll20. I do a hybrid setup where I run a live, face-to-face game using electronic tools to enhance the experience, like digital battlemaps, pictures, etc.
I felt like I had to do an enormous amount of data entry with Roll20 and even then, a lot of the stuff relied on API scripts that were prone to breaking. I got burned out running my sessions because of the amount of work I had to put in with Roll20 to make it work. Like, we're talking 10-15 hours a week when you count the time I was spending manually entering monsters and spells and stuff, alongside normal prep work, and buying the maps from Blando/Schley to display.
Fantasy Grounds... we'll see. I love that everything is in there and ready to go. If it's as easy as it seems to be, I would put myself in the "it depends on how much your time is worth camp". For me, it would be worth it. I admit I'm a little disheartened at how expensive SCAG is after shelling out money for the physical version.