8½ years ago, I commited an ugly workaround (https://freshbsd.org/openbsd/src/commit/AO7NhVXsNmk15Nrm) for a bug on #OpenBSD/aviion SMP kernels I had not been able to figure out, with the comment that ``we don't have enough volunteers for human sacrifices to get this fixed in a reasonably near future''.
I figured out the root cause a few days ago, and today I commited the fix, and then removed the workaround (https://freshbsd.org/openbsd/src/commit/k6Wq2vYqoEGrDGnt).
I guess a reasonable value of "reasonably near" is about 8½ years.