Assuming, for the moment, that smart phones and social media are bad for these kids, what do we do? We can't raise our kids without exposure to digital technology, but I'm not sure how to keep it at arms length.

I have an almost 5yo who obviously (I hope this is obvious and commonplace) doesn't have their own phone or tablet and has never used social media. But in a few years, they'll have peers that do use these things. Do I not buy them a phone? Do I just get them a cellular-connected watch so that they can call me if needed? Right now, my plan is to build them some kind of simple computer (e.g., Raspberry Pi 400) in a few years (i.e., once they can read and write) that probably doesn't have Internet access (at least at first), but allows use of Scratch Desktop and/or BASIC to learn programming, as well as "harmless" games (e.g., chess, etc.). I might also introduce off-line game systems like SNES and Genesis Classic.

What are people with literate young kids doing to introduce their kids to digital technology in a sane, non/less-addictive way?