Comment by SamDc73

I had a jailbreaked kindle a while back, but did update it by mistake and couldn't make it work again (didn't try that much honestly) and I switched to boox (which is android based e-reader)

I use it with my self-hosted calibre-web where I can sync my books to both KOReader on my boox and phone with the OPDS protocol and I use syncthing to sync my progress and highlights too ..

it's a bit of work to set up but I know it will work for a very long time, where with your solution, I wonder how long before Amazon will make it harder yet again?