Then we would be in roughly the same state as we were in the 1980s.
For those too young to remember, some things we would have to return to:
*Banking in person at a branch
Bank deposits, transfers etc taking around 5 working days to complete as opposed to instantly or the same day.
*Back to being paid cash or cheque as BACS relies on the internet (see above).
*Want to send a message to a friend? SMS, Snail mail, or pick up the telephone.
*Want to play a game with someone — you'll have to be in the same place.
*Shopping trips become a thing again for everyone (groceries).
*Prepare to spend a lot of time walking/driving between shops to compare prices (then going back to the first store as they had the best deal anyway).
*Kids might actually have to knock on their friend's house to see if they can “come play".
*Want to catch the latest episode of your favourite tv programme? — you'll have to see it when it's broadcast or set your recorder (and hope there are no last-minute schedule changes).
Binge-watcher? Yeah… wait for the DVD/Bluray release.
*Having a discussion in the pub? — good luck backing up your arguments, no Google!
*Libraries become popular again for people wanting to know stuff.
*Conspiracy theories take a nosedive as the trolls can no longer spread their nonsense quite so readily.
*News? Well… there are 24h channels for that I guess, but you won't be getting Twitter/Facebook/Online news provider alerts with the latest headlines.