The MGFV for our Trophy after 4 years / 40,000 miles is £16.5k. I have no idea what they will be selling for in 4 years time but if it is peanuts, we'll hand the keys back and move on. If it is worth more, that's great and we may well keep it a lot longer.
All the indicators I have seen is that EVs will plunge in price at some point as they are fundamentally cheaper to make at scale (once manufacturers have converted/built new plants and ramped up). The question is whether that is 2-3 years away or 5-10. Tesla say their next generation will be 50% cheaper to make, but when will it be available in the UK, could be another 3 years.