they have to design it so other companies/people can make the modules if they dont then it is just one company you are locked into buying from. computers are cheap and modular already. for laptop implements the raspberry pi and potable monitor combo is better. i spent like 650$ on my computer and i have a 1080p projector and a portable asus monitor with internal battery both connected to a raspberry pi 4. also a 2tB HD is connected to store media. the monitor does two way charging but i dont think its 3A. probably just 2.1. so if i took the raspberry pi 4 and connected it to the monitor it would probably get adequate power if the usb ports werent used much and underclocked. e, this is what i use. a asus zenscreen. https://www.asus.com/Displays-Desktops/Monitors/ZenScreen it came with a nice pen to prop the monitor up. and it tilts to portrait. the color lies close to the screen's surface and readable at good angles. the portfolio that the screen is meant to fit into does different origami-shit to support the screen at different angles and in portrait too but it makes for such a nice paper holder for when droping off documents, needing a solid surface for writing.