The LibreSSL guys are not yanking anything out of Windows, they're just providing an alternative to OpenSSL, for all the world to use, for free.
They're not under any obligation to support Windows, no matter how bad you want them to.
The concern is that OpenBSD fellas are fragmenting the project and they are also asserting that OpenSSL team was doing things wrong for a long time. This is not a start of a beautiful friendship. Throw in a bit of crowd lynching (to the tune of "OpenBSD is showing OpenSSL how to do security right") and we can end up with OpenSSL devs showing a finger and throwing in a towel. At best, we'll have to related SSL implementations, devs of which don't really talk to each other. That's the issue.
[1] https://www.peereboom.us/assl/assl/html/openssl.html [2] http://www.ibm.com/developerworks/opensource/library/l-opens... [3] http://lists.randombit.net/pipermail/cryptography/2012-Octob...
Fragmenting? Aren't they making a separate, alternative implementation?
Either way, the whole open source field is chock-full of "fragmentation", with countless precious little snowflakes rushing to fork and re-implement anything and everything under the sun to get it just the way they want it. I doubt whatever fragmentation might happen with OpenSSL is a cause for concern, especially when the OpenSSL codebase is objectively bad.