I haven't been following such things, but I just learned that GE was delisted from the DJIA in 2018, and completed a 3 way split last year, and Wikipedia sarcastically notes: "Upon his retirement from GE in 2001, [Jack] Welch had stated that his effectiveness as its CEO for two decades would be measured by the company's performance for a comparable period under his successors." That's been a long slide, but one that many predicted...

For work I'm playing around with hierarchical summarization techniques and ChatGPT4-o, and it's kind of astounding how different the output from separate runs with the same input text can be. Like bullet points that are present in one query completely disappear on the second query, and of course the prioritization of such things is always very different.