I've not liked some of the things I've heard from Mr. de Raadt in the past because they seemed to be less fact than emotion, but in this case Theo has redeemed himself in a big way.
Like it or not, OpenSSL is now one of the most important pieces of software in the world. OpenSSL protects people's bank account numbers, credit card numbers, medical records, and employment records. OpenSSL protects corporate and government secrets (hopefully in combination with other defensive tactics). OpenSSL is not used for all encrypted network sockets, but it is widespread, to say the least.
de Raadt and his team are stripping OpenSSL down to its bare minimum. That is exactly what we all need. When someone's device creates an encrypted HTTP connection to another device, you want that functionality to work perfectly. That is the vast majority of use cases, and that most important use of OpenSSL failed in a spectacular fashion.
You don't care about being able to build OpenSSL on anything right now except OpenBSD. That is the platform de Raadt's team will be using for testing. You don't care about high-performance wrappers. Computers are lightning fast now, have gigantic amounts of memory, and network speeds are phenomenal compared to the requirements of using an HTTPS connection. OpenSSL today does not want for any system resource, even on a telephone or an embedded platform.
You don't need a platform on which to perform experiments in cryptography. OpenSSL was being used by scientists and mathematicians and the NSA to test new ideas. That is not an appropriate use for the mainline OpenSSL distribution.
Once de Raadt's team is finished, one or more of the hundreds of thousands of Windows programmers can spend a few weeks re-adding their build architecture and necessary wrappers for the latest versions of Windows and some Linux people can do the minor porting on that platform.
Perhaps the original OpenSSL can be relegated back to the laboratory. If you've ever used the OpenSSL command line programs, it feels like you're working with test tubes and bunsen burners. From what I've read of the code, it is no better.