It was very much a mixed picture for my mum's circle of a similar age (b.1933) - she was OK, my godmother wouldn't touch them (as seems to be the case with most of the people I've known over 90), and others were just about OK with email and usng basic stuff like email and Google searches. Much beyond that, and it was very sketchy or non-existent. It was hilarious watching my mum use a keyboard... once she worked out where the space bar was, her left thumb hovered over that, and then she typed with the index finger of her right hand, wondering why the letters weren't in alphabetical order. She'd never used a typewriter (or learnt to drive).