Furthermore, there's something like 20k M&A deals / yr completed in North America alone, the majority that are still life-changing wealth creation events for the founders.

So don't despair - 1 problematic anti-competitive M&A deal blocked by the government does not signal the end of entrepreneurship in the US.

The founder is still the CEO owning a majority of shares and his second and third in command (or their families) hold most of the remaining shares. He's getting close to retirement and probably will do so in a few years passing the torch on to his children.

AFAIK he came from a very upper middle class background but not real wealth and kept the company alive by being profitable (not Tech margins though). That seems to be a quite sustainable business model that made him, his cofounders wealthy enough to not worry about money even we'd close tomorrow.

Nothing wrong with that and certainly something an aspiring entrepreneur could aim for. It's more difficult though and you need to run a tight ship at times and actually think longterm and how to sustain your business.

Start a business to solve a problem.

If you really build something users like, with a decent market, you will do fine (as will/have the founders of Figma).

If you hope to use getting "acquihired" to get rich even if you fail, then sorry, the world doesn't need more founders like you.