9 out of 10 Pilots do say thanks etc. but 9 out of 10 Cabin Crew don't which I find a tad discourteous.
...is generally because 9/10 cabin crew don't even turn up for the flight having taking an earlier/later flight without having the common courtesy to cancel it, which would allow the next in line to at least think they are in with a chance.
Ground staff, (of the handbag/high heel model) have also repeatedly demonstrated they don't know how to behave. Likewise many of them, despite good English speaky, fail to understand the brief, evidenced by the Q&A to ensure check of understanding at the end, leading to an offloading in one case.
End result, only flt deck crew, their families, and the occasional cabin crew get the
JS. Cabin crew partners and grd staff have shot themselves in the foot and no longer travel with me.