On February 26th, Kindle customers will lose the ability to download eBook purchases directly to their PC. If you want to switch to a rival eReader brand in the future, I suggest that you use the soon-to-be discontinued "Download and Transfer via USB" feature to archive your Kindle library.
Yea, I had like a 2nd or 3rd gen paperwhite and rooted it for this reason, but my partner's wasn't hackable until this moment. So now she can have it too.
I switched from the default reader to koreader, and now I have dark mode (mine is probably about 8 years old and did not originally have this feature). Koreader has so many features and qol improvements compared to the default Kindle experience.