> Extremely well written and maintained and high quality as of now and having a plan to make sure that can continue in the future are sometimes entirely different things with needs that oppose each other.

I think in this area SQLite has most other open source software beat. SQLite is used in the Airbus A350 and has support contracts for the life of the airframe.

https://mobile.twitter.com/copiousfreetime/status/6758345433...

Other places I have see that they have support contracts through 2050.

This is far more future support than any open source software or likely most commercial software.