I'm not sure why there would even be a gradual drift? My friends who aren't in tech are generally my most fun and interesting friends. We play D&D, we have dinner or drinks at each other's houses, we talk about anime and music and video games, we play with each other's dogs.
The only version of this I have experienced is the one where my non-tech friends are being forced out of my city via skyrocketing housing prices, which are largely due to - you guessed it - tech. It's upsetting, but there's little I can do about it except trying to keep in touch over distance.