The HN crowd seem to largely against “telemetry”. I wonder how do you know the things you build is useful if you don’t know it is being, well, used? On the ot

The HN crowd seem to largely against “telemetry”. I wonder how do you know the things you build is useful if you don’t know it is being, well, used? On the other hand, back in the server side everything days, I can have more or less all metrics I want from nginx log. I wonder was it equally frowned upon or is the frowned upon an SPA phenomenon?