ADHDer here. The problem I frequently run into is that I don't stop to consider things. I don't, for example, stop to think "should I really be doing this right now?" when I'm hyper-focused on solving some interesting problem. Pomodoro-like techniques are really helpful because it is basically a "stop and evaluate what you're doing" reminder that goes off every 20 minutes.

So to answer your question, I think I would be happy for the reminder. But I would have to be careful not to build the habit of dismissing the clock, which would undo the point entirely.

There's no nuclear option yet but I could see it being added down the road if there's enough interest. It's possible in Electron to prevent the user from closing or minimizing an app. Preventing the user from uninstalling it would be a lot more difficult but I've seen other apps accomplish it.