I think that anyone in their right mind knows that everyone is replaceable and that an organization can get along fine without them, no matter how gifted and talented they are. I haven't seen anyone on this site claim that ADP will go down in flames just because they are no longer in the company. That is just plain loco and everyone realizes that.
I also don't see much anger here, just sadness and a willingness to share their layoff experience. Enduring a layoff is certainly not pleasant. It is indeed a heart wrenching and extremely stressful experience.
Thus, inserting anger and an aura of indispensability into the rationale of the posters here is certainly not accurate. It is the loss of thousands of experienced and competent employees that are causing ADP a lot of grief now. Poor decisions were made by ADP's top management team. They can hide behind Ackerman, but it was they who ultimately decided to navigate ADP onto a dangerous course. Carlos and his team run ADP, not Ackerman.
It is certainly fine to be upset, and that won't change anything. But everyone knows that. They are just reporting on their experiences. Some people here don't want those experiences reported, and are massaging the conversation toward anger and ego, where each laid off person supposedly feels that the company will go under without him or her, in an attempt to discredit their posts. But as previously pointed out, that is inaccurate. Just read all the posts on this site for confirmation.