Users might use Steem more often for normal interactions, since the everlastingness of content on a blockchain, probably discourages some users from interacting.
How so? Wouldn't it be more interesting and beneficial for the sake of interaction that your posts, our posts, everyone content could earn upvotes, steem earnings, comments, resteems, etc, forever? Instead, that only for 7 days?
Yes, I would prefer to create content on Steem without immutability, as I personally don't really care about the immutability/censorship-resistance of the content I produce.
Uhm... yes, let's ask this to @tarazkp };)
Yes, I would prefer to create content on Steem, where the actual content isn't saved directly on the blockchain, while still having the option to enable the immutability of content.
But yeah, nonetheless, I get your point regarding avoid the eventual storage problem by reducing the cluttering and future size of our blockchain. Especially if we're talking about millions of users. :)