Framework open sources most of their schematics, if I understand correctly. So it should be possible for others to use the same standard, if they wanted to. (they don't want to)
MXM was problematic because the inflexibility of the form factor to upgrade a given system. If your laptop size, power and cooling was designed for a gtx1030 you couldn't replace it with a gtx1080 module.
In framework's case, the cooling is integrated in the gpu module, and both it's size, cooling and power deliver can be adjusted depending on the gpu power.
I don't mind having a wattage limit on the slot. That's easy to factor into purchasing decisions. The much bigger issues are how custom each kind was, with very limited competition on individual modules and a big conflict of interest in wanting to sell you a new laptop.
A friend of mine was betrayed on this by MSI, where laptops with GTX 900 series GPUs were promised upgrades and then when the 1000 series came out they didn't offer any. I think they did make weak excuses about power use, but a 1060 would have fit within the power budget fine and been an enormous upgrade. A few people have even gotten 1060 modules to work with BIOS edits, so it wasn't some other incompatibility. It seems like they saw they couldn't offer a 1080 and threw out the entire project and promise, and then offered a mild discount on a brand new laptop, no other recourse.
