I’ve had a Kindle Paperwhite for many years, and love it. I run a Calibre server at home (using https://github.com/janeczku/calibre-web), which makes e-book management nice and easy.
I just wish Amazon didn’t so thoroughly control the e-book reader and book market. I know there are other options, but there have been few in the past.
For my old Kindle Paperwhite, I have calibre-web setup to email books (to the super-secret kindle email address). It’s very amazon-y, which I don’t like. I keep waiting for my reader to die so I can replace it, but it just won’t die