We've pinged our contact at Adobe for clarification, but this could be some fantastic irony: Adobe has raised the minimum requirements for Flash. Specifically, the minimum CPU requirement for mobile devices with WVGA resolutions has been bumped up to a Cortex A8 running at 800 MHz. With its 550 MHz CPU, the Droid/Milestone no longer meets the minimum.
We're not sure yet if this is retroactive - in other words, will the Droid receive an update that removes Flash support? Or does this only apply to new hardware going forward? Plenty of people still have the device - especially the Milestone in Europe.