I've investigated whether it's feasible technically, talked with a few people who would use it to refine the concept and built a really rough prototype of the UI.

Is this just to gauge interest? Yes. In doing that though I have found a first customer that wants to switch from their current system if it works as advertised. I can't promise it will but I definitely will try :)

Thanks for your question, I hope you'll give it a shot once it launches.