TBH I might be inclined to put up with the DRM if the Kindle reader was also usable for other things (PDFs, ebooks purchased from other vendors)
But the library management is broken/non existent
So it's not just that you can't read Kindle books on other devices, but the Kindle itself is pretty much useless for reading things you purchased from other stores
Even though it was cheap and 2nd hand, I regret buying this thing