Juergen Nieveler schrieb:

Imagine how many GBU39 you could put inside a B747...

Imagine the militarization costs for comms, data-links, electronic
countermeasures...

add mid-air
refueling, a second flight crew etc. (room wouldn't be much of an
issue), and you'd get a bomb platform that can stay overhead pretty
much all day,

During the Gulf War B-52 made a trip of 35 hours from Louisiana to Iraq
and back.

just waiting for somebody to request for a strike.

And after CAS is requested the ground forces have to wait for a
Jumbo Jet to actually make the strike... A Super Hornet or Strike Eagle
will probably be able to carry about two dozens SDB. That's plenty and
speedy.