uv seems to have reverted to defaulting to 3.12 instead of 3.13. Which I fully endorse owing to how many packages are not yet compatible.

Exactly, many compiled languages like Java and Go do not suffer from this issue.

It's not about being compiled or not compiled. Python is now making breaking changes on every release instead of piling up a bunch of them and making python 4.

So what we get is a a mini python2/3 situation on every single release instead.

Yeah.

Even patch version upgrade from 3.12.3 to 3.12.4 broke a lot of packages.

https://github.com/langchain-ai/langchain/issues/22692

Tell that to all the companies stuck on Java 8 with old versions of Spring and Hibernate. This is the cost of an ecosystem where major libraries make breaking changes.

Spring and Hibernate broke the rules of the language and paid the price, and nevertheless all the companies I'm aware of managed to migrate the best part of a decade ago.