GDP is known to have shortcomings. The example from HN a bit ago is mowing the lawn. If I mow my own lawn and my neighbor mows there, the GDP doesn't move. If I mow my neighbors for $200 and they mow mine for $200, $400 gets added to the GDP. So the software I wrote for myself won't show up in any GDP calculation. How happy (or not) I am over that software doesn't show up in the GDP. My subscription to the AI provider is the only thing that will. Now, will that, multiplied over millions of users reach $6T? I have no idea. GDP is a metric like any other and is just as subject to Goodhart's law.