Similar thing happened at my previous hot AI tech startup. Once valued at $850MM (despite /no/ recurring revenue), it crashed when the market turned down. Eventually, product pivot to Gen AI, round of layoffs of 15% of the company, including at least two excellent software engineers, with no cut to exec comp (high enough for a 29 year old CTO to buy a $2.5MM house).
Eventually, the startup got acquihired. Common stock was worthless, deep underwater compared to strike price for those who exercised (and some who exercised early had to pay tons of taxes on a low basis and overinflated valuation). Investors got their money back. Execs got between $1MM and $10MM in cash.