I got spin training at 4 hrs so when I soloed shortly after it I was more aware of what could happen at any time while flying no matter how much time you had.
When I became an instructor I taught spin recovery to my students even though it wasn't required until you went for your flight instructors rating.
Being in command of an airliner and never exceeding a 60 degree bank or less and no spin recovery doesn't make sense to me.
I taught an aerobatics course for quite a while and believe it really helps a pilot feel confident in his ability to handle most anything that can upset his aircraft no matter how large it is. Airplanes basically all fly the same whether a biplane or 747. The biplane just does it quicker.