Anyway, what’s useful in MOREFUNC?

THREED — the best udf so far for working with 3D references as arrays (though stacked 2D arrays)
*.EXT — extensions of statistical functions that handle either much larger ranges/arrays or provide
much better numerical behavior
REGEX.* — regular expression text functions

There are some other handy functions, but there are usually either faster built-in function equivalents (ROW vs INTVECTOR) or they could be implemented fairly simply in VBA. One of the functions, MCONCAT, is much less useful implemented in an XLL than a VBA module because the XLL interface limits returned strings to 255 characters while VBA can return 32767 characters.

Anyway, I tend to only use UDFs I’ve written myself; I don’t know why really. I have morefunc, it looks really good, and one of these days I’m going to spend some time finding out which of its functions will be really useful to me.