Originally Posted by ianlamb
why will all devices not get an update?
Most newer models will, but older models probably won't get 5.0. Some can't run it because of older internal architecture, while others are approaching "legacy device" status and simply no longer rate that kind of support and development from RIM. Those that do get OS 5.0 won't all do so at the same time.
Apparently it takes a fair amount of resources for RIM to write the OS for each device model. This is a significant change from OS 4.5/4.6/4.7 and involves a lot of work for each model BlackBerry. I have no idea how RIM will prioritize the rollout for OS 5.0. Newest model first? Hottest selling model first? Dunno.