I suppose it's linked to smartphone usage, so to that degree younger people in particular were an easier market to crack, and that can be done relatively quickly.
But I can't see so many 50-80 year olds using apps to book 'taxis'.
However, as people get older they'll be more likely to use apps, but that'll take a generation at least, so it's a slower process than the likes of Bolt is trying to do in Bristol.
It's maybe a bit like how the high streets have slowly changed due to the likes of Tesco hypermarkets, out-of-town shopping centres and Amazon etc. So it's not just the method of booking, but the cab trade's equivalent to the corner shop being replaced by the likes of Uber, Ola and Bolt. But, of course, just like there's still corner shops while 24-hour Asda hypermarkets have proliferated, there will still be the local minicab firms and HC circuits, albeit using apps as well, at least for some of their bookings.
Part of it happens overnight, but it's partly a long-term trend as well.
So the move away from booking by phone to apps is part overnight, part due to an ageing population, and thus takes decades.
So it reflects smartphone use itself, thus what used to be a niche market for the better off and techies, is now the norm, particularly for the younger generation.
On the other hand, apps and vehicles with driver in them could be superceded by something else within a decade or two
