I keep my saws in cases: to protect the saws; protect my car or storage areas; and to keep extra parts FOR that saw WITH that saw (bars, chains, spark plugs, filters, etc.).You should hear what I think about saws in cases that come in with the owner saying the saw is leaking oil.
But what I usually get flamed for is lining the plastic cases with oil absorbent pads. Work much better than newspaper.
https://www.arboristsite.com/threads/chain-saw-diapers-keep-your-cases-cleaner.73699/
Philbert