Why isn’t it simple to swap a smartphone for a basic model that can be used to call and text but little else? Such models are very cheap, the swap does not have to be long term, and the other activities that Mike O mentioned can be carried out in other ways.
And (though moviefreakedmind did) I wouldn’t suggest that Mike O get rids of his computer. In previous posts, I’ve suggested ways in which he could limit access but still carry out essential tasks.