Libraries are self-contained and can unpack into any prefix. Applications tend to have config files, service description files, documentation, etc. scattered al

Libraries are self-contained and can unpack into any prefix. Applications tend to have config files, service description files, documentation, etc. scattered all over the system at specific locations in order to comply with host system conventions and inter-operate with supervisors and other applications. Wheel is an unpack-into-any-prefix (and stays in that prefix) binary distribution format.