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...
Another reason though to reboot every so often is for the server to do filesystem checks on the root partition(s).
Yes, I check my logs and see the constant stream of breakin attempts. Basic security precautions seem to keep them out.