Storage vehicles – what disadvantages

Dear community, I am looking for a used EQS. Currently many models are on the market, whose first registration is clearly after the production date. So the vehicles were in stock for 1-2 years, were then briefly registered and then again in stock. I find no information about whether and which disadvantages this has apart from the usual stand damage – 12-volt battery, tires, etc. Is there since production start, apart from the model maintenance 202 4, major changes to the hardware? I had the fun at Skoda. Car purchased – delivered and since the central control unit was already so outdated that the 4 weeks later released version of the vehicle software did not run any more. Is there any experience of this from the owners of the early deliveries or from more technically experienced forists?