Moreover, most of these have one huge practical disadvantage: they are not available by default on most systems. Some of them will - in a few decades,* if they

Moreover, most of these have one huge practical disadvantage: they are not available by default on most systems. Some of them will - in a few decades,* if they prove their worth - but most of them will not. So they are not something I'd ever consider depending on for system scripts for example. * maybe earlier - e.g. tmux is pretty standard on most systems now, and it's only 14 years old