Our first cloud server (supposedly to be a test) is runing since march 2018 We have managed more than 15 dedicated servers since 2012
Never an issue
I've only had them for a few years but I've yet to experience any issues with their great value (e.g 2TB €9.90 /mo) storage box servers. https://www.hetzner.com/storage/storage-box
Only issue I have with them is the latency of their Germany DC's from the US, if they end up offering dedicated servers in a US DC I'll be moving over my existing Hetzner and AWS (non RDS linked) App servers over.
You're leaving yourself open to having something exploited. Have a look at your ssh logs where "people" are constantly trying to get in.
https://www.whitesourcesoftware.com/resources/blog/top-10-li...
Yes, I check my logs and see the constant stream of breakin attempts. Basic security precautions seem to keep them out.
Another reason though to reboot every so often is for the server to do filesystem checks on the root partition(s).