It depends on use cases.

I have multiple projects running in different locations/timezones - so I don't often need to have an agent running on a pc elsewhere - but just being able to smartly use herdr (also using rex) to set up a persistent service on those computers removes all the friction which used to exist with ssh keys and other things.

So I could do all these things before, tools like herdr make it easier, smoother.

Now tmux and ssh keys enabled all this before. So in a sense, nothing new here. but its a bit like dropbox - i used rsync back then, dropbox just made it easier to setup sharing and use without thinking.