I got a box full of genlocks and other video gear in a recent parts haul I found. Thought it might be cool to make some "retro" videos for my roller derby team. But considering the amount of time it would take to learn all this stuff (never had it back in the day) I doubt it will ever happen.
That is one of the best features of the Video Toaster/Flyer, it is very easy to learn to use and intuitive. Doing some things takes a bit of studying & practice (like using LightWave3D to make moving 3D logos), but for the most part, the Toaster/Flyer is very easy to use, once it is fully set up and working.
As for the question on if anyone is still using their Video Toaster/Flyer for production work, I have a very good friend who directs and produces a couple of local cable TV shows. Until just a couple of years ago, he used his Video Toaster/Flyer to create 90% of his production work. Now, he uses a Windows based, software only, video editing system, to do HD content, plus the last service person within a 100 mile radius of where he lives quit working on Amigas and Video Toaster/Flyer systems, so he had to switch to something that was still supported, in case his system went down as he had to have something that could be worked on and fixed in a day or two, or he would miss a deadline and lose his client(s). I think he still uses the Toaster/Flyer for a tiny fraction of his work, when HD content is not required, or when he can insert SD content composite on a part of an HD screen. The days of using NewTek's Video Toaster/Flyer running in an Amiga are basically over now, but what an incredible run that product family had over the last 20+ years.
I'll keep using mine for personal use for years to come.