A 5+5 IET▸ has more seats than an HST▸ but is a downgrade in all other respects.
Oh come, come ...
* an IET runs a lot of the way on electricity which, more and more, is generated sustainably
* IET running schedules, when the timetable is revamped, will be noticeably faster
* Station dwell times, especially at stations unmanned when a train calls, are significantly reduced
* There is no danger to passenger from sticking their head out of windows
* There is no Victorian dumping of human waste on the track
... I would have thought that the first of these, especially, would be really important to you!
Mind - replacing class 43 with class 93 (the "Unicorn" class - fast bimode power cars) and modernising the HST carriages like Cross Country are doing on their sets might have dealt with HST issues highlighted above.
I was referring to passenger comfort and facilities.
The use of electricity for part of the mileage is indeed a step forward as regards climate change, but not of direct benefit to those on board. The underfloor engines are used for most of the journey to Cornwall and are a disbenefit if compared to a proper train with a locomotive or power car at the end.
IET times should indeed show an improvement, but this has not yet been realised.
Retention toilets are better for track workers, and for passengers waiting at platforms. But for those on board are arguably a backward step as more to go wrong and therefore often out of use.
I am not opposed to the PRINCIPLE of bi mode operation, and have only relatively minor objections to the mechanical design and specification of the IETs.
We cant live in the past forever, and I would be more accepting of the new units if they had a proper inter-city internal fit out.
Just add a buffet, padded seats, more tables, reliable toilets, a working reservation system, and make the majority of the fleet full length and gangwayed throughout, and I (and I suspect many others) would regard them as acceptable.
I would forget, or at least forgive, the underfloor engines provided that the train was otherwise of proper inter-city specification.