Why can't it be simple to update technology?

I get increasingly frustrated with the gap between the technology companies and the internet connections they expect you to use to download their software/updates.

Apple have decided to use only their App or iTunes store to supply their software & updates. That's all very well & good if you have a great internet connection. I only have access to a fairly slow wifi internet connection that has a fair-use policy which disconnects you after 60 minutes. Now it takes 80+ minutes to download even the smallest iPhone software updates, and if the connection is interrupted, the process starts all over again from the beginning! Why can't it pick up where it left off? That would make life so much simpler!

Anyway - that's tonight's whinge over & done with.