...the first thing I did when I understood a formula was to write a program on my calculator to solve it.
...the first thing I did when I understood a formula...
...I understood a formula...
That's the key issue here. You did the work, you took the time to study and think about your tasks. Not everyone a teacher has to deal with is quite as thoughtful with their studies.
So they want everyone to show their work. They want everyone to prove they "understood a formula."
Now please excuse me while I review some log tables.
They're providing a needed service
The fire department provides a needed service.
and enabling micropayments from people who don't want to see ads but don't want content producers to die due to lack of revenue.
It is Apple that doesn't do anything for subscriptions except payment processing for which 30% is just BS.
That string tied around your finger is only there to remind you to breath, it's not a "fee shcedule" scale by which you can measure business entities against the shit from bulls.
Apple is greedy, Readability is greedy...business is fueled by greed.
...crappy...I just don't get it... I can't imagine...
Not everyone suffers from those issues.
Stagnant OS? That's laughable.