Personal experience, not speculation. I had to take my E70 in for repair under warranty because of a non-functioning keyboard (some keys were borked) they said they had to replace the motherboard. Just after a year buying it (ie just after the warranty had expired) the same problem occurred. However this time after factory resetting the phone the keyboard worked again. But for my peace of mind I wanted it looked at and took it in to Nokia service, they said it's been discontinued and need to get spare parts from abroad. So I told them to stuff it. Luckily the keyboard is still surviving.

Just because the E70 didn't sell as well as the N95, doesn't give Nokia the right to drop support just like that. Especially when at the time of purchase it was practically[*] their top-end "business" phone.
[*] Not sure whether the E90 was around at that time.