The real two camps seem to be:
1) People constantly chasing the latest technology with no regard for whether it's appropriate for the situation.
2) People constantly trying to shoehorn their favourite technology into everything with no regard for whether it's appropriate for the situation.
2) above is basically "Give a kid a hammer, and everything becomes a nail."
The third camp:
3) People who look at a task, then apply a tool appropriate for the task.
Kafka is anything but new. It does get shoehorned too.
Postgres also has been around for a long time and a lot of people didn’t know all it can do which isn’t what we normally think about with a database.
Appropriateness is a nice way to look at it as long as it’s clear whether or not it’s about personal preferences and interpretations and being righteous towards others with them.
Customers rarely care about the backend or what it’s developed in, except maybe for developer products. It’s a great way to waste time though.