It's not a philosophy that these companies subscribe to, it is the nature of Thermal vs Piezo Electric head technology. Canon, HP, and Epson all invented inkjet printer/head systems in the 1970s at about the same time. All have improved their designs and inks but their basic functions have stayed on course. If there is any real innovation in these head designs I would have to think it is in the HPZ machines. They have a head that combines two channels only. What that means is if one channel fails you don't replace the whole head ( Epson ) or 6 whole channels ( Canon) . And their heads are like $70.00 each that you just pop in, and last me a very long time. That way you don't get hit with a big bill when one of your channels goes dead in the middle of a job. For us poor folks out there, that's a pretty big deal.
Hp has made some wonderful advances in printer technology that you would have though they would have followed up on. They just seem so confused on the marketing side of the company in deciding what they want to do with it. For instance, why didn't they ever come out with a solid desktop unit using these super permanent inks. Imagine what they could have done if they had added one more light gray channel, it could have been killer for toned and neutral bw that all faded at the same rate. They could have sold a lot of ink.
When companies get that big they are like the military or something, the right hand doesn't even know what the left hand is doing at any particular time. And their old CEO who screwed a lot of things up when they merged with Compaq, is more interested in running for president but can't even get into the debate line up. What's that all about? It's shows she was more interested in politics and marketing than technology. But tech people don't run these companies anymore, sales people do.
john