I imagine open source boot software being better than closed source (a real no brainer) but whats the difficulties with the open one? I'm not very versed in those very low level things.
Not entirely the case anymore. Libreboot switched to a blob reduction policy in order to support more hardware. Hopefully this will bring things forward quite a bit over the next year.
Unless they support the newer platforms, it will remain a niche product. I've come to accept a compromise between binary blobs and FOSS bootloader, and the path that Libreboot has chosen is great for the community, so we'll wait and watch