[Sin2x]

You already need to deal with 3 things as opposed to one and learn PromQL to boot. If you want to have dashboards you also need to learn and use Grafana. I used both Prometheus+Thanos+Grafana stack and Zabbix in production and can say with certainty that the latter is much easier to use and set up for infra monitoring than the former. You need a whole dedicated observability team to use Prometheus effeciently.

[viraptor]

I'd disagree as someone running grafana+influx+telegraf for a few reasons.

Dealing with 3 things... feels about as much work as zabbix. That one requires server + db + agents. Basically the same components I'm running.

Promql/flux - while I know it, I almost never use it - instead in grafana click the database name, metric name, aggregation and I'm done.

While you need people to use it effectively, it's the same for everything, including mysql for zabbix. You can dump prometheus/influx somewhere with no configuration and survive for quite a long time.