In article ,
Jose wrote:

It does suprise me how readily U.S. owners appear to chuck out the old
equipment given that doing so does restrict the choice of alternates
in many cases.

Weight and panel space.

In a plane used for training, there's a much more serious reason to tear
out the ADF. If you go for an instrument rating checkride in a plane that
has an ADF in it, the examiner can (and probably will) ask to see an NDB
approach flown. Maybe even partial panel. Which means you need to train
students to fly partial panel NDB approaches (and holds). What a frigging
waste of time and money.