The Linux kernel is the most well known codebase that is specifically GPL-2-only. I wouldn't be surprised if there were other 2-only codebases made by people fa

The Linux kernel is the most well known codebase that is specifically GPL-2-only. I wouldn't be surprised if there were other 2-only codebases made by people familiar with kernel development, either because they were influenced by the kernel's choice or because they wanted to be able to use code from the kernel. QEMU is in the latter boat -- we have code that was copied from the kernel, so effectively we're GPL-2-only despite having a fair amount of 2-or-later or BSD or other licensed source too. This is awkward because we'd really like to be able to use the binutils disassemblers, but we're stuck on the versions from the last GPL-2 binutils release...