I think this is ridiculous. Why would an improvement in 64 bit speed warrant a move away from Single Instance Storage?!? Making multiple copies of everything is better? Have you seen my storage subsystem and tape backup bills lately? How about that continuous replication traffic. For smaller shops that only have a single mailbox stores, or very little division (there are a lot of us out there!) there's a real benefit to SIS. Especially my company which CC's everyone on the planet with messages. I mean, why not have us all using 1001 PST files again and use my trusty file system open file agent to backup files? It's one more reason not to bother with consolidating mail in exchange. At least demonstrate how NOT using SIS is supposed to be an advantage. this article comes off as "Since we can do things faster now, we're not bothering with keeping this efficiency we had before because we an lumber around it". Just like giving end users a huge hard drive with tons of free space is supposed to motivate them to organize and remove old data they no longer need.