The content of my ordered list. Not the formatting of my ordered list. Those two items are shared by many wiki formatting schemes (including the two mentioned) and by POD.
Note that I see a worthwhile "win" in supporting those two points. I don't currently see a worthwhile "win" in supporting any one of the many, often quite similar schemes for avoiding typing things like <em> and doing links more verbosely and slightly differently than PerlMonks already does them.
But, no, I really don't see a "win" in replacing <b> with the equally-verbose [b] especially since [b] already means something at PerlMonks.