I tend to grow my fleet of servers every couple months, and that requires me to once again setup everything from the beginning, settings, sshd, update debian if old version, new user for ssh, docker/podman, …
Quite literally added new vps to my fleet yesterday and spent 4 hourson setting all that up, when it could have been a simple ansible script.
Sed comes into play there, or :%s in vim, whichever you prefer ;)