I've been using plain text for over 10 years. It's simple to use, easy to modify, has as complex of a tag system as I would like, and will be around until heat death. Why fix what ain't broke.

Instead of e-ink displays, I wish companies would try to make strides in transflective lcds [0]. If more companies invested the time and resources, I think that the potential cost savings and technological benefits (such as a higher refresh rate and no ghosting) over e-ink would make a killing.

Right now, I only know of one commercial product [1] currently being made that is taking advantage of this untapped market.

[0] https://en.m.wikipedia.org/wiki/Transflective_liquid-crystal...

[1] https://www.sunvisiondisplay.com/product/SVD-32-Color-RLCD-C...

You know what has the same, and even sometimes better, precision, requires no batteries, lasts a life time, and is usually a lot cheaper? Classic analog vernier slide calipers. You really don't need anything that fancy the get some exceptionally precise measurements.