Note taking device (idea)

First thing I found out in researching this idea is that someone made almost same thing I'm trying to do:

My idea was to put an epaper display instead of normal LCD. But reality does not end here. On Reddit there is a subreddit called r/Writerdeck.

And its sole purpose is for people to share all kinds and shapes of small writing machines. Or in other words, exactly what I thought was my original idea. It turns out my idea is late a decade or two, or four.

Anyway, moving on, the project actually can be simple. If there is an Atmega32u4 that handles the keyboard, and there is ESP32S3 that handles the writing software. How to make a writing software I'm not sure, nor how to display it on e-paper display. The problem is that display has max refresh rate of 0.3 sec. I'm pretty sure that everyone can write faster that display can refresh. That might feel bad for writing.

What kind of key switches should this device use? While browsing I found Kailh type low profile switches which are more expensive than normal mechanical switches.

I guess that's the price of low profile thin switches. But for the sake of transportation, the device needs to be as thin as technology allows. On the other hand maybe typing on classic thick key switch can be better for overall writing experience.

Well, considering how one of the current projects is designing just a regular keyboard. I might just wait and see how those switches behave on regular keyboard, and then just implement those that are better.