I like this idea. I went looking for an Android launcher for this purpose. I settled on "niagra". It doesn't really limit anything, but it allows me to hide the app menu visually. I just have 7 apps on my main screen. And there's no "recommended" or "recently used" apps, and there's no google search bar and no browser on my main screen. I like it. I've simply forgotten about a lot of apps over time. Out of sight out of mind.

Another interesting thing that I do: I use uBlock Origin to gimp websites and hide recommendations to limit my browsing, without limiting my use of the actual website.

I want all my actions to be purposeful, no aimless browsing, no recommendations.