I agree that some of what OP said is true. Maybe it could have been written differently to have captured a wider audience.
I think that the post only sees half of the picture. It focuses only on those who didn't 'upskill' or those who 'did the bare minimum'.
There are also a lot of people on here who lost their jobs who were very high performers in critical areas of the company that were not at all obsolete. Many of these people will be replaced by contract workers or younger workforce - all of which will cost less than the experienced SMEs they'll replace. The leadership making these decisions must feel that the brain drain is worth the savings to their bottom line. I don't know how old OP is, but some of us were around when corporations began off-shoring to low-cost countries in the early / mid 1980s. It didn't matter how 'upskilled' you were or how much work you did. The bottom line drove all those decisions...
For the people who did the bare minimum, I do hope that this leads to a positive change.
But I wouldn't be so quick to call out those who didn't 'upskill'. I know many SIRP'd engineers who worked on various ICE engine components / systems. As this country heads towards EV powertrains, many ICE powertrain engineers will become obsolete. There won't any engineers needed to develop pistons, etc. But at this early stage in the transition to EV powertrains, many of these ICE employees were simply caught off guard by this mass layoff. Especially the ones who have been working in their ICE fields for 20+ years. Heck, half of the angry posts I've read here these last three days seem to think that mass EV adoption is a pipedream. I hope that this SIRP will at least get people thinking about their skillset and how future-proof they are. I think that was one of the points OP was making.
PS
I've read that the executive leadership believes that it would take too long for these people to employees to be 'retrained' to work on electrification. I know a bunch of SIRP employees with master's degrees and PhDs. I genuinely believe that these people have the capacity to learn another EV-friendly skill set. The real issue, in my opinion, is that the executive leadership was so far behind the competition in the transition to EV that they would rather implement mass layoffs and rehired instead of retraining their existing (experienced, loyal, etc.) workforce. Big miss by executive leadership - that has severely impacted the lives of 3,000 people and their loved ones...