i agree with you, Coverman, when you sat purpose built EV platforms will be better than conventional platforms but given how flat the floor is on the 454, i think it it would make a good EV. look at the Polestar 2, they used the platform on which the XC40 is built on and adapted the batteries and motors to suit. the I-Pace... it used the platform the XE, XF and F-Pace are built on. even the original Mini is being converted to electric by specialist companies, its only time before someone converts a 454 to electric.
anyway we digress... trying to keep the 454 on the road as long as possible will become harder, if its used as a daily driver, as most of us do. its only a matter of time before most are either scrapped (as a few have been done), or they will be locked up and used occasionally like classic Mercs, Jags and the like.
its owners and enthusiasts like us, that know how special they are, will keep them going and as numbers start to dwindle, prices will eventually start going up in the UK and catch up with the EU market prices.