[nixpulvis]

I'm not sure I want to weigh in on "log" vs "metric"... but I did want to add some thoughts on logs in general.

If you need to "log" something to give users feedback as the system is running, it may be less of a log and more of a progress or status output.

Logs to me are things which happen and I want to be able to trace later, so summarizing or otherwise dropping logs that come in quickly in succession would be a problem. If I need to filter I pipe to grep, otherwise I can just save it all and read through it later.

Status messaging, which may be informative about your process is useful, and if its goal is to be observed real-time, then yea. A message or two a second seems like a good goal for consistency.

These are just two very different use cases to me. And generally I find the former critical to get right, while the later may be nice to have and may lead to discovery by nature of making it more accessible.