To me that sounds too technical again 😉 but sure, if there was an affordable kind of whiteboard in my livingroom that syncs with various services that would somehow enhance the sheet-of-paper-solution.
I always oscillate between embracing and avoiding technology, at least over the last years. It’s great to be able to plan and define training sessions using an app or a website. Having the parameters of a planned run in my watch is great, makes sense and motivates me. On the other hand (as you mentioned) the sheet of paper on my table gives me an overview. It’s great to see how it fills over time, the times/distances visible and easily there for a quick lookup. I also used some different colors .. worked great. Also the manual activity of scribbling/writing is rewarding, I assume it also has some neuro-feedback aspect maybe? (actually creating a plan, then doing something and checking things off)
The technical stuff sometimes sounds great in theory and then … disappoints sometimes in usability, reliability etc / my work contains a *lot* of problem solving in IT, so in my personal life I sometimes just tend to “less is more”. OK, I use that fat GPS watch, yes. not exactly “less”.