It's a fine app, but I'm not sure why gruber is glazing it so hard... is he not able to spot something so clearly built by AI? it's one of the better ones but it's got all the hallmarks. I'd be surprised if it's maintained a year from now.
He was against the unofficial Mac port of Notepad++ but that had many problems other than being AI-assisted.
to me craft is a human quality, I don't look at Ikea cabinets and praise their craft for example, and I'll admit that some of them are quite nice... it's just not the same process