Well, companies also use ejabberd, but that doesn't make ejabberd a valid piece of software either.
Then there's the massive problem of "everyone" using MongoDB and we know how much pain _that_ sucker causes. Playing popularity contests with software isn't useful. People install software either because of social reasons ("I don't know how anything works, but I hear everybody is using X, so I'm going to use X too!") or because they need the functionality ("redis is AMAZING at 30 different things!").
If install base at well known companies were a valid measure, we'd all be using Windows laptops while talking into our Kin and squirting our Zunes all over each other.
Then there's the massive problem of "everyone" using MongoDB and we know how much pain _that_ sucker causes. Playing popularity contests with software isn't useful. People install software either because of social reasons ("I don't know how anything works, but I hear everybody is using X, so I'm going to use X too!") or because they need the functionality ("redis is AMAZING at 30 different things!").
If install base at well known companies were a valid measure, we'd all be using Windows laptops while talking into our Kin and squirting our Zunes all over each other.