ChaosBSD is a fork of FreeBSD. It exists because upstream cannot, and should not, accept broken drivers, half-working hardware, vendor trash, or speculative hacks.
We can.
↫ ChaosBSD GitHub page
This is an excellent approach to testing drivers that simply aren’t even remotely ready to be included in FreeBSD-proper. It should be obvious that this is not, in any way, meant to be used as a production operating system, as it will contain things that are broken and incomplete on purpose. The name’s also pretty great.

This is indeed a great project with a great name.
It is a shame they are AMD64 only. There needs to be a test bed for ARM64 and RISC-V as well.
I guess when there is a need to test drivers in ARM side it will have a port…
@Sysau
No doubt you are right. But I guess “when there is a need” is open to interpretation. Same thing for RISC-V. If you look at the commits for example, there was work on the RISC-V WiFi drivers just a couple of weeks ago. ChaosBSD prunes those out because they strip everything not AMD64 related.