However, it's let down by two things; [a] the combination of processor speed and SD read/write times makes it slow for many things, and [b] the battery life has bettered three hours.
The most unfortunate thing is that after three years the battery started to bloat as it reached the end of its life, and I've found no way to get a replacement battery from China to my home in New Zealand. Local distributors don't stock them, shipping services won't transport them. I bought one and got it to a trans-shipping centre in the UK, but the NZ company responsible for the final leg of its journey declined to carry it. Currently the OneNote is out of commission.
But I remain very interested in devices with these form factors. I've owned two 11" Sony Vaio laptops which were remarkable machines in their day. I plan to purchase a PinePhone Pro with its keyboard case accessory, and I do think a clamshell (or detachable) with one the latest eInk displays (colour, variable refresh rate) would be a fantastic tool.