I agree, it’s the longer range batteries that are already appearing (the 64kW Kia/Hyundai batteries, etc.) that will change the need to charge from overnight 7kW to Rapid 50kW & upwards. The people who have a driveway or allocated parking space where a home charger can reach will still charge at home mostly as it’s often much cheaper.
I have a summer range of maybe 190 miles in the Pug, maybe 140 miles or even less this time of year, I charge at home mostly because I can, but even in this backwater there’s rapid chargers getting nearer. If I’m doing 100 miles plus then I often decide to pull in & grab a rapid charge.
Cost wise, if you can use a 50kW Rapid at 15p/kWh to charge up for an hour once a week then you’ll be doing well enough. If you can charge at 5p/kWh at home overnight then that’s excellent. If on your handful of long journeys per year you blast in 50kW+ in 20 minutes at an ultra rapid for 58p/kWh then you’re saving so much the rest of the time that you’ll not care & will pay for the speed & convenience.
All the above is dependent upon having decent sized batteries though, there’s no point having a battery that will give you 80 miles total & have to drive 10 miles to fill it up at a rapid, just as you need enough range to make the charging stops at where you’d normally stop for a comfort break.
Now, in the last few months I’ve noticed that the EV charge companies are indeed rolling out more rapid chargers near towns & ultra rapid chargers near motorway junctions, so they’ve already decided as they’ve installed next to no 7kW fast chargers except the handful at Tesco. The other place rapid chargers are about to appear is McDonalds/KFC etc., (Instavolt – the really reliable chargers).
Ultra rapid chargers that can do 800V charging are also appearing (Ionity), now that’s Porsche Taycan territory for 350kW charging at the moment, but it’ll arrive in other cheaper cars soon enough as there’s little reason not to double the battery packs from 400V to 800V so they can be charged twice as fast.