The key is printer maintenance. With proper use, I wouldn't say Piezography or ConeColor inks clog any more or less than Epson inks- they work very much alike. We have lots of information available to help keep your printer clean, working well and lasting a long time, and to help you get the most from your inks and papers as well. For example, regular agitation of pigment inks is crucial for maintaining in-suspension pigment particles for consistent results (this is true with all pigment(ed) inks, including Epson, which is why they say to shake cats before installing, and use contents within 6 months of opening).
I hope this helps, please let me know if you have questions or there's anything further I can help you with.
Best regards and happy printing~ Dana