Who cares if WP Engine disables revisions. Wordpress.com disables the use of plugins, arguably a core feature of WordPress, unless you pony up $300 a year for a "Business" tier account.
I don't know about you but I would be more frustrated not being able to revise posts? It's bad enough on twitter I can't update my posts, I have to delete and repost
I can't speak for blogging usecases, but for agency websites we would disable revisions and a bunch of other things for every single wordpress installation(even the blog posts that show up on the main admin area)
"Every WP Engine site has WordPress revisions disabled by default... Revisions can only be enabled by contacting Support... Support can help you enable 3 revisions for your posts to start. Revisions should not exceed 5."
Every WordPress installation I have seen has had plugins. And likely used revisions too. So I would say about the same, both are mandatory features for most users.