I've also used Netdata for years on many servers now. One of the problems with it is its way to fail silently when some healtcheck or alarm is configured badly instead of erroring out on the process start. I understand the reasoning behind it - it tries to monitor by default as much as possible and if some collector fails for whatever reason (let's say you don't have MySQL installed) then it will be just disabled and only way to know that is by looking at the dashboard and not finding it there. I'm only using local agent and not the cloud which means that if server dies totally then there's also no monitoring insights - something to keep in mind.