In this best-selling book, Geoffrey A. Moore describes winning strategies to scale up businesses in software and technology - though it was written back in the late 90s, it is still the 'bible' for software-strategy and growth.
Edge use-cases are those, that are interesting from a product manager's and engineer's standpoint and often resemble great intellectual challenges - still, mostly they are hardly relevant to the majority of customers.
Looks familiar?
Traveling with IT- and Telco-Equipment - it is still too much to carry.