Thank you for explaining. People talk about the S&P rules like they are written in stone. There's so much emotion around these exact companies and not the structural shifts that may cause the S&P to adjust its rules. For example, for a time they banned dual class share companies, which would have banned Google from entering today (they were grandfathered on). A ban which they reversed 5ish years later.

They have resisted that pressure historically, and remained fairly conservative. But if these companies stay in the 1T+ range, that's an amount of pressure they have not had in the past. You also missed one of the largest exclusions for a time for profit reasons that's also relevant here - TSLA.