Why Backspace key do not work in insert mode in shell file by default in Cygwin?

Question

I am using cygwin to run "linux command line" on windows 10. But here, backspace key doesn't work in insert mode. I had to edit my .vimrc file by setting "nocompatible and "bs=2" to make it work (by watching a youtube tutorial). But why it doesn't work by default? Is this normal behavior of Vim? Do backspace doesnt work on actual linux also??

Answer 1

Backwards compatibility (with vi, and also with earlier Vim releases) is a big thing in Vim. However, there have been many complaints like yours in the past, so Vim 8.0 introduced a :help defaults.vim configuration that gets activated if there's no user configuration.

As you can see in :help 'backspace', the default is an empty option, and defaults.vim sets this to indent,eol,start (which you should use instead of the deprecated and difficult to understand value 2).

'backspace' 'bs'        string  (default "", set to "indent,eol,start"
                                                            in |defaults.vim|)
                        global

defaults.vim has other sensible settings, and can be combined with customizations in your own ~/.vimrc; it's worth to have a look!