I've had a link to OnlyKey's user guide bookmarked for about a year[1]. They're an open hardware company that offers a key. Despite that I still can't be bothered to go through with it. The article we're talking about includes many of the reasons.

I feel bad for the author. They put a lot of their heart into something that could have been awesome.

[1] https://docs.onlykey.io/usersguide.html