FIPS support is such a rare requirement (and such an awful one) that I'm willing to bet LibreSSL, once it's 'finished' and buildable on the typical Linux system

FIPS support is such a rare requirement (and such an awful one) that I'm willing to bet LibreSSL, once it's 'finished' and buildable on the typical Linux system, will be gladly adopted by pretty much everyone who can. Distros will probably prefer LibreSSL whenever possible, with the exception of Debian, unless the licensing issue can be resolved (which I hope it is because GnuTLS is awful). The vast majority of people who use OpenSSL don't need FIPS compliance, and LibreSSL will provide them with a more solid, better reviewed, more secure, lightweight, reliable drop-in replacement. It's hard to argue with that.