I remember a bit of fanfare when tmpfs was enabled in OpenBSD - http://undeadly.org/cgi?action=article&sid=20131217081921 and at the time switched from using mfs to tmpfs. At the time it appeared that tmpfs solved some mfs issues. It seems we've come full circle and noticed during a perusal of the cvs list that tmpfs is now disabled in -current. However, there seems to be no mention of that in following -current faq at https://www.openbsd.org/faq/current.html.
