indigo: Profit margins of non-Mag 7 S&P 500 companies have not risen in a decade

indigo pointed out that the profit margins of the 493 companies in the S&P 500 excluding the Mag 7 have barely risen since 2015, with growth being captured by the leading companies. He believes that the leading companies monopolize computing power, talent, and capital, and reinvest their profits into computing power and R&D, forming an accelerating cycle; after new companies such as Anthropic go public, the Mag 7 may expand into a Mag 8 or Mag 10. He judges that companies unrelated to AI will find it hard to rise further unless their corporate structures are transformed by AI.