yes, those folders are all missing in v0.172 but they are all there in v0.171 bin package. I removed them from v0.172 install and no more errors.
Can anyone confirm that the plugins folder have missing files ? Here's a full list of v0.171 install
... edit ... I just did a clean v0.172 install and no more errors. Will these missing plugins folders still be used in future MAME versions ? ... end of edit ...