In the early 2000’s there existed two main ecosystems in mobile software J2ME and BREW (not counting Symbian) the latter BREW, operated by Verizon. I had cofounded a QA consulting company that heavily based itself off BREW’s highly extensive developer portal. Then one day without warning, the developer portal disappeared. Luckily I had the foresight to download all the documentation a week before. My cofounder, a Microsoft developer was dumbfounded.