They pretty much all work off a 3 year maintenance plan. However there are EMC SANs in use today that are 10-15 years old. You just need to contract with Uni-Sys or another company to handle the maintenance for the extra two years.
Not quite sure I understand. Are they refusing to support their gear for the extra 2 years? We have a bunch of stuff thats going on for 6-7 years now, and is still not planned to be replaced. Yes, we pay more for maintenance, but thats a cost we absorb.