I have another corner case: Audio books. I was infuriated to discover when I bought one on my computer in work it was then just about impossible to transfer it

I have another corner case: Audio books. I was infuriated to discover when I bought one on my computer in work it was then just about impossible to transfer it to any device that I could actually want to listen to it on (without resorting to hacks, or the analogue hole - through which it would have amounted to about 6 CDs of content). The licence was not transferable to other devices either so I couldn't just download it again either.