Very similar to the PE crunch currently in progress for the same reason: interest rates that rose fast and will remain higher for longer.
It will take time for everyone’s expectations and actions to reach the new macro reality, with current participants attempting to "find a way out" that is most favorable for the circumstances.
[1] https://danluu.com/startup-tradeoffs/ | https://news.ycombinator.com/item?id=40363262
But without an IPO it becomes a chance for a small royalty payment, and this is a lot less attractive success.
The situation will improve as the Fed cuts rates, but zero interest rate policy that fueled the previous economic exuberance is unlikely to return due to structural economic changes.
https://fred.stlouisfed.org/series/FEDFUNDS
https://www.goingvc.com/post/how-rising-interest-rates-impac...
https://www.wsj.com/finance/investing/high-interest-rates-cr... | https://archive.today/DPlzm
What data do you base this on? "Long term" companies that do not choose to become publicly listed go out of business all the time. Some of them even get obviated by competitors who do choose to go public, and as a result, have a ton more money to outcompete the non public ones.
I'm saying that's neither right nor wrong but there are examples of the good on both sides; Jetbrains and Crowdstrike seems to be doing fairly well despite staying private and going IPO, respectively.