I will admit that I do not understand that move; especially so if it is a cost cutting measure. Then again I remember arguing with a VP that storage is cheap and email size limits are draconian enough already. She was not pleased. Maybe it is really just about the budget.
It's entirely possible they aren't even backporting support software like the build tools.
When you are supporting a large number of old versions, it becomes difficult to keep all the quirks and variance straight. On one team where we were only talking about supporting about 4 versions, and were already seeing friction. I was stumping for splitting up the responsibilities across multiple engineers, so that everyone was responsible for knowing the current version, and only one old version, but I don't think the other people saw the trap I was trying to route us around.
When did this feature come into the app? 1.2? 1.3? 2.0? I dunno, but I know it was after 'my' version (1.1).