[KineticLensman]

Not to this Brit. 'Lessons' all the way, both in corporate speak and in my multi-decade involvement in building training and education systems. We did used to identify 'key learning points' which would summarise the main things a student was expected to take away from a course, but I never saw this abbreviated to 'learnings'.

In my corporate experience, the main thing about lessons was whether they were 'identified' or actually 'learned', e.g. following a corporate post-mortem of some cockup/fiasco/disaster.