Beszel is my go to monitor now. It gives a quick glance at all my nodes, NAS and even my PC. If I want to dig in, it's one click. I can also change the time frame and review the last 12/24 hours at a glance. I tried pulse and proxmon. Both were good, but needed multiple screens to see the whole environment. Grafana and Prometheus are the gold standard, but configuration seems like a skillset in itself and it does take more resources on every node.

This monitoring video definitely helped to show how min racks suffer heat creep where the components leech heat off each other.