Pros/Cons of Local Workplace Install

I currently have local developers running their own Netweaver Workplace instances (J2EE + MAXDB + NWDS). I can see supporting these local environments to be a headache. For example it takes 2 hours just to apply SP STACK11 to one pc assuming their pc configuration is consistent.

What is the true impact of users having to connect to the development server to develop their apps?

Is their an easier way to patch these local environments?

Any insightful comments are appreciated.