I've noticed this too. There is a huge bring back cash campaign on FB, I can understand why, I don't like the fac that the Gov/Shops can monitor everything I spend, for their own personal gain.
I definitely always use cash in small independent shops/cafes's as they cant afford the card processing fees & I like to spend my money in small independents, rather than in big chain stores.
As others have said you definitely spend more carefully with cash, Its so easy to just go tap, tap when your out & about & before you realise it you've blown £20/£30.
My DD is 14 and we will still give her pocket money in cash.
I'm probably very old skool, but I also don't want to have a banking app on my phone, in case it got lost/stolen etc.. I've heard too many negative stories.
If we don't continue to use cash, then it will be phased out