Supporting open source creates competition for your paid alternative, so they're forced to give you a better product or a better deal.
You get access to training, assets, source and production logs like the recent Dog Walk update while also supporting Blender:
https://studio.blender.org/projects/dogwalk/production-logs/
It's easily one of the most well-made FOSS projects out there!
A particular example that was mentioned was the importers that were each done standalone rather than built on a common framework. This was a couple of years ago and of course things may have changed since then.
Just to note that the developers were still extremely positive about working with and in the code, but it does seem plausible that there would be issues like this in a codebase where many devs focus on a small piece of the overall puzzle.
Weight is just nonsense. Physical presence is not a hard requirement for value.
Physical presence is a requirement for stuff. Stuff has value because of the balance between supply and demand. Information that has been digitally encoded has literally infinite supply. Information only has any value in the context of imaginary property laws that impose artificial scarcity.
AI companies downloading information is not subsidizing AI companies. Imposing imaginary property law is stealing from the public domain. Everyone's public domain.
Even just a coffee a month will help immensely. Please consider supporting :)