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.
If you want to install this please DO NOT USE THE CH341A programmer. That fucking shit has the internal control signals and data signals at 5V and the bios chips usually work at 3.3V or lower.
The CH341A is defective by design and the Chinese manufacturers don't care. There are fixes online, but still the chip works badly.
If you want to install libreboot, please use any other option given at Libreboot docs. I lost too many hours because of the fucking Chinese ch341a. Which I solved quickly with a pi pico board.
In any case do not use this guy's video as an example. The instructions of the video ARE WRONG and you may fry your bios. Don't be fooled by this youtuber confidence. Follow the docs.
There are some mobos, most of them are from prebuilt desktops.
I found only one "gamer": Gigabyte GA-G41M-ES2L from 2009, Socket 775, supports Core2Extreme, that was a beast 15 years ago.
But any other mobo can be used as a gaming mobo, usually they have standard ports and and newer ones tend to follow standard ATX sizes. Front IO ports usually use different configuration, but you can still use it in a case, possible that only the onoff button will work, no leds and reset, that's good enough
Looks like this will need few years to mature. God willing it will support for more modern situations over next few years. I would deff consider my upgrade around mobo that supports FOSS BIOS.