I look at this decision differently for BOB than for weekend backpacking. I choose tent for backpacking, poncho/tarp for BOB.

My BOB has to get me a much longer way in much less time than if I'm recreating. If I'm bugging out then comfort shifts lower on the scale. Weight, which equals speed of movement, becomes more important.

Of course if I knew ahead of time that the bugout was to destinations unknown forever then I'd make different choices.