If you're refusing to admit that the standard in software upgrades is one version, then any further discussion is pointless.
No one's suggesting that there's no impact, and I' not saying it's a good or bad move, just that virtriolic dribble aimed at Adobe for daring to change their business practices to be inline with the industry standard is absurd.
By all means tell them you don't like it and by all means vote with your feet, but let's stop demonizing the company or the executives or the staff (and, no, I don't work for nor have shares in Adobe) and let's stop postulating silly arguments about how Adobe "owes" this or that. Yes, their communication has been poor and they've rightly taken flak for that, but again this is by any reasonable industry measurement a reasonable upgrade policy and the previous policy was generous.