I don’t think it may help in a long run, except in cases when you mistyped a command. Mistakes are done because some assumptions are wrong, e.g. wrong cwd, host

I don’t think it may help in a long run, except in cases when you mistyped a command. Mistakes are done because some assumptions are wrong, e.g. wrong cwd, hostname, account, and a captcha-like barrier cannot point that out or make you think about it more. The correct way to prevent mistakes is easy reversibility. Except for very big files/changes we now have an essentially unlimited disk space. Programs should learn to use it to manage undo.