If you can 'convince' Tesla to sell you a new 90kWh usable pack for the 75D, your have essentially the same range as a raven but for £15k vs £30k+ for used or £50k+ for a brand new S.
The 75D pack in our X has served us well for 70k+ miles across Europe. Logically it makes zero sense to even consider spending £5k+ on a new battery as the range in the 75D is perfectly fine for our usage. But when the time comes I'll see what Tesla offers.