Which could happen .. That could also happen to Netflix, Spotify, Sky, Itunes, Steam .. Etc .. Etc ..
Unless we go back to good old trusty non up-datable physical media that will always be a concern. I can bet a fair few people moaning here use at least one of the aforementioned services. Which ALL require a connection at some point on a regular basis.
Your worrying about something that quite frankly isnt in the great scheme of things worth worrying about.
So someone paid £40 for a copy of ED, five years down the line FD decide to turn the servers off. I would say that is money well spent personally.
Really are you going to cry over £40 for five years of gameplay? The reality is that the game will probably last a lot longer than that in one form or another. In the end it makes me laugh what people 'worry about'. Your worried about the longevity of a £40 game. What if you £5000 Itunes account suddenly became useless, then what would you do?
Get a grip here people ....
I see your point but some people paid many hundreds of pounds for a game that they thought they could own and use forever and play without outside dependency factors like servers. Many of these people would not have paid the many hundreds of pounds for just another connect to service.