"TMTCFY"? new "Dashes" section & "memorable"  

I'm delighted to see the new "Dashes" section progressing (it appears) in the approval/adoption process.

In your reply to one of A. di M.'s posts in the subsequent discussion, you used the abbreviation "TMTCFY".  A search of 4 major online dictionaries of abbreviations, plus both a WP and a Google search, yielded no explanation of it, and I couldn't figure it out from the context. Am I missing something?  (I'm not particularly fluent in that argot.)

Finally, in the section "Features of the Draft" of your "Preliminary Notes", you said, "...  the principles themselves are simple and memorable."  Memorable?  MWC11 defines memorable as, "worth remembering   NOTABLE ."  Although these rules might be "worth remembering" in one sense, I don't think they rise to the standard MWC11 intended, which IMO implies something of considerably greater significance.  E.g., the day you were born was probably a memorable day to your mother; "To be or not to be, that is the question ..." is one of the most memorable lines in all of English-language literature; but 
"an en dash is not used for a hyphenated personal name"?  Umm, not so much.  It's simply of a different ilk altogether.  (I'm not sure principles was the right word to use, either.  Aren't they just rules?  Or rationales for those rules?  But I'll let that one slide for now.  My prior quibble is sufficient unto the day.)
And now, one craves a cup of tea.  – Jack