I'm planning to buy a framework when they start shipping to the UK. I looked into buying one in the US and getting it imported, but the additional costs were mo

I'm planning to buy a framework when they start shipping to the UK. I looked into buying one in the US and getting it imported, but the additional costs were more than I wanted to pay. I went through their website and chose my own customisation and there was an option which said 'None (bring your own)'. Windows included costed extra compared to this. I understood that it would be straightforward for me to run eg. Ubuntu on the machine. "The Framework laptop is clearly designed with Windows in mind, and when I ordered mine, I did not see a Linux or "No OS" version, though. I do not believe that it's possible to use a 100% Free/Open Source operating system without binary blob drivers on the Framework at this time." What does 'binary blob drivers' mean?