All of that is moot unless you've tested the software yourself and found it to be broken in certain terminal emulators.
I agree with your point that it's easy to write CLI software that relies on features not all terminals have, but it's almost equally easy to write simple and portable software and test it in the most used terminals.
I agree with your point that it's easy to write CLI software that relies on features not all terminals have, but it's almost equally easy to write simple and portable software and test it in the most used terminals.