Education
Hmm 30 months of support sounds like an improvement but still falls a bit short, especially for Education. By the time they have updated SCCM (plus a hotfix), the ADK and MDT you typically have already lost 3 months.
Also Education is difficult to tackle due to the number of sites (schools) and sheer numbers so the reality is mass imaging/feature updating is a summer holiday event. So by the time you are rolling out a "September" update you are already into 9-11 months of the 30 month support window. 30 months doesn't reach for another 2 summers so you are basically still stuck on a 1 year cycle of updating/imaging/replacing.