I must say, I thoroughly struggle to see how anyone can find a 700 anything other than, in almost all respects, the worst (new build) EMU to have graced the network in the last 15+ years, in terms of customer environment. The interior spec is spartan at best and has all the ambiance of a hospital waiting room (seats of similar comfort). The ride is poor, the omissions glaring.
The lack of USB/WiFi provisions is, frankly, appalling (for a unit introduced 2015-2019). For a unit designed to serve the capital and in some cases be the grand "welcome to Britain" for travellers arriving at Londons secondary/tertiary airports, its ridiculous that they fail to provide facilities you routinely find on buses. Customers, rightly, shouldn't and dont care what the reasons for this may be, they simply notice the poor provisions on board.
If you think the presence or absence of a USB charging point is going to sway somebody between driving and taking the train, then I think you are, at best, deluded.
Then call me deluded. I have family who live near Gatwick. The lack of provisions on these units (admittedly above and beyond, but inclusive of the USB chargers), is one of the reasons I'll now drive a good 200 miles, rather than simply take the train (and as rail staff, the bulk of my journey is free or discounted). I can't imagine how I would feel having to pay full price for the service and generally wouldn't, other than through lack of viable alternative.
But since you can't use either laptops or mobiles (except for hands free voice calls) when driving, the fact there may be power in car doesn't really offer an advantage.
What about passengers in the vehicle? What about connecting music to the audio system? What about when you simply forget to charge your phone and it would be a lifeline to do so?
What I do think is naive is the belief that every single user of the 700s is on a sub-30 minute commute and is making a journey roughly akin to a ride on the tube. Its nonsense. Gatwick to London is roughly an hour. Brighton to London pushing 1 hour 30. These aren't short commutes, far from it. Infact, the average journey on a Voyager, certainly, won't be far off these timings.
The media has been full of numerous complaints from customers of these units. It simply cannot be denied that the interior only really caters to a proportion of the market they, in reality, serve. As a leisure user of these trains, I actively avoid them. Luckily on the bulk of routes where I use them there is usually a viable alternative service from southern, so thankfully I rarely have to endure them. This isn't something I can say for any other train and this isn't an enthusiastic angle on my "prefered" unit - its about the shameful lack of facilities, uncomfortable and spartan interior that is so exposed in nearly every seat I can't help but feel a little bit vulnerable.
We're now actively trying to encourage people back to the railways, I can't help but feel these units do precisely the opposite.