> If you want a greyscale display, you can use a tool like f.lux to de-colorize all your monitors.

For some of us it is not the greyscale that we find easier to read. e-Ink reflects light, while LCDs emit light. My eyes like first a lot more.

For over 1000$ you can have reflective LCD 1080p display.

https://www.sunvisiondisplay.com/rE-Monitor