This is why I not only favor purchasing DRM-free media, but also keep a local archive of all such purchases.

    $ ls /mnt/comixology | wc -l
    239

(This can be a bit difficult for larger‐sized media, such as video games, but I do it anyway—my GOG archive is over two terabytes.)

I also have a small collection of DRM‐free music I had purchased and downloaded from Amazon that no longer seems to be accessible online. Certainly I have no plans to purchase anything digital from them in the future.