your average unix program, esp. something like postgres which has been developed for literally decades, will basically spread itself into well defined compile-t

your average unix program, esp. something like postgres which has been developed for literally decades, will basically spread itself into well defined compile-time locations which are easily removed by any competent package manager or even competent manual build (touch package.stamp && make install && find $prefix -cnewer -type f package.stamp > package.file-list ) It's only 'random' if you don't know what you are doing. Containers are fine and often good, but their existence/availability doesn't 'supercede' real knowledge.