Yeah that tweet says it all.
I liked the 2am UA 777 to LAX and the 3am DL 764 to BOS that ran this AM.
UA left from concourse F and DL left from Concourse T from the otherwise empty airport.
To quote the Offspring, "You gotta keep 'em separated".
F1 and F2 probably would not have been the wisest idea. Convenient, but ... nah.