last night I saw John McVee on Dateline and he was playing a Padulla or something like that, what's up with that, No Alembic?!!!!

I did not see Dateline,but in a conversation with Rick Turner found out John will be using Turner Electroline and Renaissance basses for the tour.

II read somewhere that Rick Turner was the man who introduced John to the Alembic basses when recording the Rumours LP.
I guess he brought his own brand.
Quite normal from commrcial point of view.