Subscription services… not so much

Today I cancelled my Kindle Unlimited and Audible subscriptions. The latter because I’m not using audio books as frequently as I once did and the former because Amazon adds and removed content to the unlimited library in a similar fashion to Netflix. I don’t see the value in maybe having something I like to read. I’d rather own the book and not a license to maybe see the book when Amazon feels like it. I wonder if a market exists for devices that allow you to interact with digital content that you own. It would be a huge up hill battle to make such a company and try to compete with the likes of Apple, Amazon, and Google.