[ZoomZoomZoom]

Healthy and not extremely niche Free Software projects don't disappear. My software stack I rely on daily mostly barely changed in 15 and more years.

The amount of businesses closed, sold and products abandoned or swapped for the more controlled/exploitable ones is numerous, on the other hand.

[1shooner]

>Healthy and not extremely niche Free Software projects don't disappear.

This sounds a lot like a circular definition.

[ZoomZoomZoom]

Not really? One is the cause (bad management/tech debt/problematic architecture/no public interest, etc.), the second is the effect.

[philipallstar]

It looks as though your definition of healthy is "survived"; i.e. projects that survived have survived.