Steam have said they'll tell people how to unlock their purchases if they go bust, why wouldn't other companies?
Comixology goes bust, the next week there will be guides online on how to get the comics out of the app, if there aren't already.
There will always be a piracy option - I disagree with it, but I'll do it if they take the comics I have bought back.That "piracy backup" option is going to go bye bye in due course. Napster was good while it lasted too, but even it saw its day in the "free for all" sun come to an end.
We used to record cassetes, then copy CD's, then there was napster, currently there's torrenting. Tomorrow, there will be something else.
The entertainment companies can try as hard as they like to stop me - if they didn't intend me to be able to keep the files permanently, they shouldn't have used the words 'buy' and 'purchase' in the transaction.
If they solve piracy, as you claim, then DRM's will be lifted, and we can keep the digital files however we see fit, and back them up to protect them.
And there's a million ways that print comics can be damaged - clumsiness, pets, mold, flooding, fire, earthquake, thieves etc.25+ years and counting on my print collection so far. Will you be able to say the same thing for digital copies stored in the cloud? How do you even know that it'll exist in 30 years? I know, in my own hands, I can take steps to make sure my print collection is around for the next 30 years. I've got no control over the state of those off-site servers and storage centers we call the cloud. It's all about control. Who should have control over your property and purchases? Do you trust big brother or do you trust only yourself because you're the only one who can "do it right"? I'd rather bet my money on me. I don't trust any faceless organization to have my best interests at heart.
The cloud probably won't exist in thirty years - there will be something different.
Whatever it is, I'll be using it for my digital comics, and it won't take up as much space as the print comics will.