No one would buy it. That’s the reality.

Their are two customers for printers businesses that need high reliability and high volume. They will pay more for this, if it’s cost effective in the long term. An open source solution wouldn’t be much cheaper, a business supplying servicing and repairs are still needed. The other are consumers that want something that appears cheap and are too ignorant to asses long term cost. They are served by budget printers sold for a loss. That loss is made up for in by selling them ink that is exorbitantly marked up.

An open source solution cant be sold for a loss, if the carriages are also open source. Only people ideologically in favour of open source solutions and those that do the maths to estimate long term value of printers.

Brother laser printers are good value per print. But they cost much more for less features.