This is not really a DevOps question but more of a System Automation question (which DevOps covers only a part of, by popular opinion, so I hope it's okay).
I feel like some 5 USD IaaS VPS with Ansible could give me the peace of mind of technical stability for say 15 years on a
debian:stable system, but the
debian:stable release itself will get old and vulnerable with the years.
Everything above the OS will generally not get old because by Ansible (given a correctly orchestrated playbook) will continuously update and upgrade it.
Yet the fact that the OS will indeed get old can't get out of my mind. Transferring websites from one IaaS to another even once per 4 or 8 or 12 or 16 years is not something I want to do in principle. One could say, well, you can't eat the cake and keep it whole.
I thought of using PaaS but PaaS solutions wouldn't necessarily bring me that peace of mind as well because my data might be "thrown" in some server environment with an old OS (could be old as 20 or 25 years) without me even knowing that and not all PaaS companies guarantee streamed OS release_upgrade.
So, I desire some full system automation solution. Is there even such a thing which is usually stable and countable in earth in 2018? I ask this totally seriously, maybe I need to be less stressed about this, but maybe such technical solution (which isn't SaaS of course) exist and might suit my needs?
I just want to build my websites (usually Drupal) on the most automated, most upgraded system (OS and above) possible, in the budget of 5-30 USDs.
Note: I never provided hosting services and doesn't provide them now either - usually my websites are personal websites that only I myself manage.