I went down the rabbit hole of looking for an epaper note taker (some great YT reviews on all of them - this was my favorite: youtu.be/St5bZDCWRpE) and settled on the Boox Note Air Plus 2. I wanted long battery life and a backlight so I could read at night mainly.
There is a minor lag when writing but not troublesome for me - but I absolutely love it.
The only thing is I don’t fully trust the company that makes it since there are some issues surrounding the openness of the Linux OS they used so I don’t sign into personal accounts on it, but just transfer PDFs to/from it through the Wi-Fi drop.