Modern technology. My grandparents would be astounded by the mobile phone, they didn't have a telephone in either of their houses. We didn't get the phone in until the late '70's.
The smart speaker. It's something out of a sci-fi movie. Impossible to imagine asking a little box in the corner of the room to play music, or read your book, or remind you about things you need to do.
Estranged Son and Future Granddaughter
To think that London, or anywhere else for that matter, does not belong to any one demographic