I think the main issue is many e-readers don't have GPS
. I had an old e-reader that I rooted ages ago and installed full android on it. It worked ok, processor was slow too, but some things were hard to read in grey scale. While you can get 16 shades of grey, I suspect that a color tablet (what I use now) works better as it's overall clearer to see which is a green can or red nun.
Plus a cheap
color tablet can be had for $125 ish or about the same cost as a cheap
If you have solar
, then the cost to charge the tablet is minimal. I actually just got a Lonovo tab4 8 plus which at $200ish is a mid range tablet. I use it for everything. I purchased it as it had a very little bloatwere that was easily deleted, good battery
life (8.5-10 hours+) sharp screen
for my old eyes and very nice sound and good camera's. I made this dicission after looking at ALL the tablet specs for all brands.
For my alas mature eyes having a bright full color display works far better when reading a chart on the screen.
The big draw of an e reader is low power consumption
, but grey scale charts can be a bit harder to read, at least too me.
BTW rooting a ereader is getting harder to do now a days, that and the lack of GPS
is the main issue I went color.