actually it is supposed to be a literal standup. standing encourages very quick and to the point updates.

Yes but the act of standing is a crutch, if you pardon the pun. What matters is brevity.

Agreed, I don’t need to stand to ensure my teams concise in their update. The parking lot concept is a great way to shorten meeting and politely interrupt people when they are long winded.

You are missing my point entirely. Yes its called a standup because standing encourages brevity. Just because you sit or stand doesn't mean its a standup in literal definition though.