@cstross @adacosta @otolithe @stroughtonsmith agreed, I got a PocketBook reader to see what the fuss is about e-ink and frankly can't understand why anyone would prefer the grainy, low-contrast screens over an OLED or LCD iPad.
That said, the iPad's limitations are a direct consequence of Apple's self-interested control freakery. I am writing this on a Google Pixel Tablet running GrapheneOS, and while the hardware is nowhere as nice as my matte iPad Pro M4 13" or iPad mini, the software runs rings around them. Like a full-featured email client that can show full email headers and will auto-load images from designated senders only, or Tor Browser that doesn't require contortions. Also the calm from an OS that is not festooned with self-shilling ads.
Also, the hill I will die on: the real value of tablets is you can and should hold them vertical in portrait mode, which is why I found Apple moving the FaceId can to the long edge so galling.