I can relate to this. I conducted UX experiment during my Master's in Human Computer Interaction which was testing an impact of various interventions to screen time and user perception. I observed very similar pattern, if it clicks it stays with the people. Of course the experiment was with small group, but still.

A good comparison I think are "self help" books. People are still reading them and those books are really helpful during certain times. While same ideas and concepts are circulating across those books.

I believe such kind of apps and software deserve to exist. Whatever helps people to make their lives better.