Massport is changing some things at Terminal A:

AS has moved out as of today and Sun Country is moving out shortly if they haven't already.
WN is moving to gates A18-22 as of 4/1.

(Sources: respective threads on the AS and WN forums. Since I'm on the mobile site, I can't link to them easily.)

For DL fliers, this means that more flights will be using the main terminal instead of the satellite. This isn't a bad thing, except it means the SC will be orphaned, as the only DL gate on the side the SC is located is A17. (To be fair, A13-16 aren't that far away.) Also, adding WN fliers to the security mix should be...umm...interesting. If you're not Precheck already, there's no time like the present.

What are the chances of DL reopening the SC in the main terminal?