In the end it somewhat boils down to pure greed. Instead of stabilizing production costs and/or reusing generic components to ease up manufacturing and repair - HP, Epson, Canon, Dell, Samsung, Kyocera and others try to hype their products with whatever tech stack is currently in trend. "growth hacking" is literally their job description.
There eventually will be a ChatGPT printer on the market. It's inevitable due to what kind of people manage a printer business: It's not the type of people that know how to build printers anymore.
I got years of use out of a second-hand Brother 2350 printer and then eventually some of the electronics failed. I needed a new printer and I still owned a couple unused Brother toner cartridges. Imagine my joy when I discovered that Brother would sell me a new model that still used the same toner system.
Sticking with the same spartan feature set was fine by me. It's all I need. I didn't even bother looking at the other makers' low-end offerings. Brother's approach of treating printing as a solved problem (Build once; sell often) is so much simpler and more cost-efficient than the super-frisky alternative (Build many times; sell once)