In almost a decade of using Pycharm I have not once used the builtin shell. (Debug console is another matter.)

It can never beat the system terminal+shell setup you pick yourself (for me Alacrity+z4h zsh distro). I can only see it as a nice-to-have for when you for some reason cannot install your own terminal. The UI-UX divergence from the system-wide shell setup will always be too wide and incur a learning-curve/feature gap.