Our choice of the weak-copyleft MPL license reflects a strategic balance:
Commitment to open-source freedom: We believe that OS kernels are a communal asset that should benefit humanity. The MPL ensures that any alterations to MPL-covered files remain open source, aligning with our vision. Additionally, we do not require contributors to sign a Contributor License Agreement (CLA), preserving their rights and preventing the possibility of their contributions being made closed source.
Accommodating proprietary modules: Recognizing the evolving landscape where large corporations also contribute significantly to open-source, we accommodate the business need for proprietary kernel modules. Unlike GPL, the MPL permits the linking of MPL-covered files with proprietary code.
Wouldn’t the LGPL also allow this?
I must say, being able to create, build, and bootstrap your kernel and run it in a VM with 3 commands is pretty cool.