[Symmetry]

1) A pretty great experience even before you start customizing. I only add a git status section to my status line and set some environment variables in my config.fish file.

2) An effort to clean up and orthogonalize shell syntax. The potential portability means I usually still make bash scripts when I'm sharing for others, but for my own stuff it's great.

3) Suggested completions. I start typing a command and if it's one I've used before in that directory it appears in faint gray letters on my command line and I just have to press ctrl-f to bring it up that way.

4) Probably a consequence of (1), but it feels very fast to me compared to when I used zsh. The author also talks about using threads and minimizing disk access to speed it up, but I don't really know how it compares to zsh on that level.

[pekk]

I don't care about experience before I start customizing because I am very certain that I will want to customize. A smaller configuration file does not benefit me at all.

I don't find zsh to be slow even on an older machine, so I'm puzzled what you mean by that.

Which only leaves the suggestion feature, which is interesting but not enough for me to pick up yet another shell with syntax that is even more different from the rest.

[StavrosK]

Regarding #3, you can also just press right arrow.