Technological age divide.
For example, my parents barely use mobile phones and pc's, while I am expected to use an ever growing number of highly complicated programs, machines, apps and environments (the internet has become a mystery to most people, getting more convoluted and unwieldy by the minute.) to minimally function at my job. For me internet usage is almost like a sixt sense, because I grew up with it. I can almost feel my way before each click. I know what to expect, which adds to trust, were not to go, what sites are legit, how to search... fast, but to someone not in the know... it can only be magic and mystery, like that mother in her 40 using facebook and playing candycrush? I am scared for her. How would she know? Can I really trust my parents with that much power?
And they are not even 60 yet. I can only imagine what the world looks like for older people.
Or people jobsearching in their 40/50s. If I was an employer, I would not hire "old=stuck" pleople either. Shure, some folk educate themselfes, but most are just getting swept with the tide.
Unfortunally that gap is a real thing and it is only getting wider.
In a more positive interest: 3D Printing.
Currently doing a lot of 3D-Stuff for clients. It's fun!