Learn English – Word to describe someone who does whatever they please

They are coincident events.

From MW dictionary:

Simple Definition of coincident : happening at the same time

the hard economic times and the coincident increase in crime were a double strain on the city's social services

Common synonyms are simultaneous and synchronous. Also, contemporary, though a synonym, is more of an approximation.

I reckon there are more fitting words than these, but I'll carry on.

Without a specific reference to having grown up with something, you can be (or become) accustomed to [technology].

If [technology] pervaded your childhood to the extent that it is everywhere and all-around and is second nature to you, it has become accepted and incorporated into life, you can be said to have been indoctrinated into technology. The word basically means "brainwashed" or "conditioned" - but can be toyed with.

Conditioned might be worth a quick mention because it refers to "having a significant influence on or determine the manner or outcome of something."