OP is talking about a phyaical server. The Lindy Effect is for "some non-perishable things". A server that already has already been running for at least 55 monthes is definitely perishable.
A server running software has both perishable and non-perishable elements. The physical hardware is perishable and weakens with age, but as the software itself ages the likelihood that it contains bugs like "it crashes whenever daylight savings occurs" decreases.
The question is which effect dominates at a particular point in time.
The question is which effect dominates at a particular point in time.