Wojtek X I don't agree with you. Everything can't be reloaded using source .bashrc or .zshrc, source .bashrc will reload the envs without closing the terminal. But Sometimes it needs to log out to get an effect such as showing app icons (vary with system to system)

And Do you use it? Or just saying it's scammy content without using it?

Thank you for your comments. Nice suggestions. I use cd for new users because they must know how to go to that particular directory (more practice), ls /bin only gives the list of items but does not change the directory. and some systems do not require logout they just work seamlessly such as POPOS(I use). But some need it.

I also use dual booting. Which Linux OS are you using?