alt Hacker NewsCan you please elaborate on what you mean?
Ubuntu does not aim to be a permissively-licensed system. It can include copyleft (e.g. GPL) and permissive (e.g. MIT) without issue.
Permissively-licensed systems like FreeBSD and GrapheneOS cannot include GPL code if they want to remain permissive.
GrapheneOS does include GPLv2 code both via AOSP and our own but not GPLv3. We want GrapheneOS to have no additional restrictions beyond AOSP. AOSP uses GPLv2 but not GPLv3.
We do need to be careful with GPLv2 due to license incompatibilities. For example, GPLv2-only licensing such as the Linux kernel is incompatible with Apache 2 and GPLv3. GPLv3 is compatible with Apache 2 so GPLv2-or-later can be compatible but only by using it as GPLv3 with the extra restrictions too.