No idea about the refresh rate of eInk displays, but terminals were always designed to work over slow connections. So long as your configuration is pretty trad

No idea about the refresh rate of eInk displays, but terminals were always designed to work over slow connections. So long as your configuration is pretty traditional (e.g. your text editor scrolling half a page at a time instead of line by line), it should be quite usable by 1970s standards.