The plugins listed in Discourse pricing | Discourse - Civilized Discussion, I assume they need to be installed separately when self-hosting? Or do some of them come preinstalled when performing a cloud installation? Please bear with me if dumb question.
Which official plugins would you recommend to have installed from day one supporting a tech community run by a big enterprise?
As a self-hoster, you would need to install most of the plugins you want to use. There are some that come bundled with the core installation (like Chat, Footnote, Spoiler, Checklist, and others), but most would need to be added if you wanted them.