Judges usually don't know this stuff, but they primarily work with systems and software supplied by the state...whose experts should know what they are doing.
My bet is that this guy decided to work on personal equipment, probably in violation of the rules. Being a judge, he's unlikely to be sanctioned for it, and will certainly learn from the experience. If anything, there may be some internal discussions which we'll never hear about.
Law is an area where AI can add value, though... searching through past rulings and legal opinions is tedious, and anything that can assist to find needles in haystacks would be welcome. It shouldn't be used to write legal judgements or arguments though...
It's time for Steam to launch their own payment processing company, and apply pressure directly on the card networks and the future competition.
It won't be nearly as profitable as their current business model, but sometimes industries need a shakeup.