I want to hire a VPS but my problem is that most if not all of the VPS services out there require me to choose an operating system in a given version and "run along with it"; if I want to **majorly upgrade it**, I must, at least in principle, backup everything I have added upon it, delete the OS and then install a new version of the OS from the VPS hosting company's own interface (the one I used for installing the old version) and then bring all additional information from the backups. In other words, there is no "continuous integration" of an operating system.

A plausible solution to this problem is shared hosting where the staff takes care for everything OS related but if one still wants a VPS and to have a continuously integrated OS both minorly and majorly, what could be done with todays available software, if at all?