How about extra output or verbose option?

[joyously]

Fresh from another question about what shows in jj log, despite there being a FAQ entry for it, I'm wondering if it would be a good idea for jj output to be more verbose.
Maybe not all output, but those commands that rely on a config for a default parameter should print what it is set to (echoing the command you would have typed if there wasn't a default) like

• plain jj relies on an option for the default command
• log relies on the default revset
• an alias could be printed out
• fix relies on fix.tools being set

There are some other defaults around auto tracking bookmarks and remotes and private commits, but they don't really represent a command line flag unless you use --config.

With this in place,
when typing jj, the first line output would be jj log,
but jj log also has a default, so it really should be jj log -r present(@) | ancestors(immutable_heads().., 2) | present(trunk())
I'm not sure which, or if it would show both. Looking at it here, it seems messy, but I think newbies would understand what is going on and learn revsets faster. It would also be a way to identify if you have a config set funny (but don't know to look). Perhaps it would be useful for troubleshooting. I notice that there is a global option for --quiet and --debug but not --verbose.