I use it for Calls, SMS/MMS, Email, Calendar, tasks/TODOs, various chat applications, 2FA, password manager, and internet. So it fills the functions I expect in a smartphone.
I think it has some apps for social media, but I only have a mastodon acccount for social media.
The only thing really lacking in it is a decent maps app, but for the most part I get by just fine without that.