I have owned mutiples of various titles over the past 30 years.
Some up to four times.
Some that come to mind are. TAF, CFTBL, NF, HSII, WH20, FT, EBD, BSD, T2 and many other SS and EM games.
Some have never left.
There are fundamental reasons such as condition, price, quality, space or changes in lifestyle.
Most that stick around do if they collect and restore.
If people just play, they don't.