BY-SA

As both a consumer and producer, NC makes it kind of a pointless untouchable dead end even if I never intend to make a business out of something.

A lot of unintended things could be argued as commecial and who wants to risk it? If I do something purely as ahobby, and along the way make a youtube video about it, and that video pays money, I suddenly become techically in violation of non-commercial. Or I use it in a class where I was paid to teach. Or any number of ordinary possible uses that along the way do involve an exchange of money.

Let alone the freedom to change my mind in 5 years and decide I do want to sell something I made that initially I didn't.

I don't know what I might want to do tomorrow, so best to just not invest any of my time or effort into anything that might bite me later.

ND is 100x worse. Why even bother publishing a design at all then? Just sell your commercial propeietary product, and any users who want the plans you can just sell them more service for support and customization instead.

So I only apply BY-SA to be as similar to classic GPL as possible, and it's no problem at all if there is a business that can't accept the SA terms. It doesn't prevent selling a product, it just prevents being a dick and a thief (well on paper anyway, of course they go ahead and steal anyway but that's a different problem).

If I ever had something where I didn't want anyone else to be able to sell it, I just wouldn't publish it at all in the first place.