For me it was the death of IBM's preeminence in IT. When I started there a job at IBM was prestigious,a job for life. More than once I was told that we had a lengthy backlog of inventions and technological wonders that could be wheeled out of the plant if competitors ever nipped too closely at IBM's heels.
At that time IBM had never made a single person redundant - anywhere in the world. The company had an incredible sophisticated internal HR platform that did elaborate succession planning and considered training and promotion as major workforce factors - there was little need to think much about recruitment because jobs for life. IBM could win any deal, maybe needing only to discount a little if things were very competitive.
It's impossible to imagine now what a lofty position the company held. It's not unfair to say that, if not dead, the IBM of old is no longer with us.
I think the pace of progress and innovation has, for better or worse, meant that companies can no longer count on successfully evolving only from the inside through re-training and promotions over the average employee's entire career arc (let's say 30 years).
The reality is that too many people who seek out jobs in huge companies like IBM are not looking to constantly re-invent themselves and learn new things and keep pushing themselves into new areas every 5-10 years (or less), which is table stakes now for tech companies that want to stay relevant.
