It is customary for core components to be upgraded between builds, but certain parts - chassis, power supplies and storage - are easily carried across multiple generations. The chassis, in particular, has the potential to live on well beyond other hardware, as evidenced by ongoing support for the decades-old ATX form factor.
Makes you wonder, how often do folk upgrade their PC chassis, and do any of you continue to house new parts in ageing enclosures? Let us know using the comments facility below.