Hi Mike,
>The array is not a memvar at all. It's more of a structure.

Depends a lot on your POV. If you visualize it as a Locator in a C-Fll, the difference is a memvar has 0 in l_subs, whereas arrays have 1 or 2 (plus the offset values).
...
>Don't let them spend time figuring things out. Tell them.

Putting MDot on left side of an "=" assignment already told the compiler it has to target a Memvar (including arrays an objects). MDotting that or the targets of "Store" is redundant.
No problem with citing personal preference or grokking speed - but it is redundant.

>
>Many people write this:
>select alias
>replace alias.fieldname with value.

Those people need to be introduced to "in alias" and the eof() trap of their coding style ;-)

regards
thomas