Money is useful mostly for hiring human labor to outcompete others, e.g. Satya Nadella has 100K employees under his command, you don't, so you can't realistically compete with MS today - this is their main moat.

If AI renders human labor a cheap commodity (say you can orchestrate a bunch of agents to develop + market a Windows competitor for $1000 of compute), what used to be "Satya + his army vs. you" now becomes mostly a 1:1 fair fight, which favors the startup.