If you do not work with dynamics, for statics there are still a lot of encounters with deferential equations. Euler-Bernoulli Beam theory or plate and shell theories can be used for times when you want to solve more complex problems for which predefined equations do not exist and you do not have access to expensive fea software.

Pretty much anything dynamics related. Starting basic displacements, velocity, acceleration integration for simple dynamic systems to more complicated equations for wind and spinning rotor interaction induced vibrations in wind turbines.

The my mentioned "all of it" includes excel :) but nowadays we a bit by bit transition to python

You can always try to pivot from project management to actual engineering. I am load engineer for wind turbines and everything is time dependant and dynamic. For past 10years i use every bit of math I learned is school and uni.

I guess depends on engineer

As an engineer i literally use all of it daily.

Yeah the pricing only makes sense if you live in New York, California or something for the rest of the world it's like wtf 20bucks for an app

Nice