Going to #DirectionsNA next week.
Any session I should not miss? Or someone I should meet up with?

This is one of the most useful pieces of developer reference for BC in a long time.

I seem to remember that they found the average time to call and instantiate a subscriber codeunit was 0.0005ms. So it does not matter in 99.9995% of cases.

Agreed, Claude Sonnet is currently best when it comes to writing Al code.

Count 2 - the ternary operator is just syntactic sugar.
The important part is that they do increase complexity, just like if and might require more testing.