It's only $100! Thew cartridges are $100,000.

This is all I can think of when using HP printers. They will saturate the market and then destroy aftermarket 3d printing materials with DRM

Agreed. I can only hope that today is a new era, where open source software is mature enough, and manufacturing of tools is ubiquitous and cheap enough that a large company like HP will not be able to manipulate the market the way they've been able to in the past.

I don't think it is likely these days anyway, especially when it is not a consumer product.