With a quick count, in my MoI setup, I have 156 shortcut keys. (Windows 10, Hi def monitor)
There are probably a few unused key combinations. Some combinations have other computer uses...
(Organization is shaky, at best :-)

This list is not exhaustive.
Script shortcut keys:
Keyboad keys, 39 each
Alt+_ 42 each
Ctrl+Alt+_ 19 each
Ctrl+_ 30 each
Ctrl+Shift+_ 19 each
Shift+_ 7 each

Also, under the CustomUI scripts icon, 442 scripts (including many trial/test versions/ past script writing work in progress).
That is 12 columns of 36 rows, plus top row of 10 more built in scripts like Flip and Rebuild...

- Brian