I really don't like hardware vendors who restrict the replacement of wireless cards in laptops. They pretend to do it for regulation and certification purposes but in the end all the chipsets are tested and regulated. I have never experienced any hardware issues with e.g. Atheros cards (which runs without blobs). My conspiracy theory is that the 'certified' card has been tested for better observation, but that's pure speculation until the next Spectre like breach for this kind of chips is out.
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