Correct. You get me something that will read my CYA at 70 ppm, CH at 800 ppm, and FC at 30 ppm (when a SLAM is necessary), then back up the truck.
Thats probably going to be a while. This happens one step at a time. Right now there are a bunch of here that have the Atlas Scientific Industrial pH probe installed in their systems. It works great. I test mine every few months and calibrate as necessary. It is very accurate. And now I dont have to tell the difference between shades of red. Turns out my pH is much more stable than I thought. Its not cheap, but its not expensive either at $200.
The next step is a true FC probe. Those used to be about $1000, but we are starting to see models come out in the $300 range. Non have been tested so far, but it is only a matter of time. Again not cheap, but not crazy expensive.
Now these are not drop in your pool, battery powered self contained fully automated systems. They are probes that need to be installed in your plumbing (usually through a bypass), and connected to a control system. That will come eventually. But right now this is relegated to hobbiests that dont mind spending the time and money to get a level of control they dont need, but just want.
I also still wonder why someone has not come up with a phone app that will look at a pH comparator block and look down the CYA tube and tell you the result. I would think the cameras on phones have enough of whatever it takes to get the right info, and some basic AI to read the results. Isnt that what all these other devices do?