70k is anything but low in Berlin. It is actually really, really high. For reference see here (monthly before tax) https://www.morgenpost.de/bin/bmo-213539703.jpg

With that amount of money one could afford a very sweet place to live easily, and still have plenty of spending money for intellectual pursuits or whatever.

Speaking English is no issue here, at least in the "hip" parts of town.

Would I say it's the best place to live? Probably not (Switzerland would probably rank higher), but one could do a lot worse. And with a decent IT job it's easy living. Dirt cheap compared to Silicon Valley prices.