Ok. Here are some reasons:
1) Loss of modifiers.
-You basically lose all ability to use reflectors -
Not true, Joe Mcnally uses them all the time.
-Almost no studio modifiers are built with off-camera flash use in mind, which is why they have to be specially adapted.
-Large and double-baffled modifiers overwhelm their power capabilities and become mostly useless.
-Complete loss of specialized modifiers, including but not limited to: adjustable reflectors, parabolic umbrellas, and fresnel spots.
2) Huge power sacrifice.
-No overpowering of the sun on location -
Not true, http://www.joemcnally.com/blog/2008/05/19/david-of-the-desert/
-Inability to use large modifiers, especially gridded -
Not true, I've seen large gridded softboxes powered by strobes
-Limited use of scrims
-Inability to light large areas or full-length subjects -
Not true again, see Joe Mcnally or go through the strobist pool
-More lights needed to provide the same power or light the same area -
I will agree with this, but this is a matter of WS and is fairly obvious
3) Loss of configuration possibilities
-More triggers required than pack setups
-Inability to control multiple lights from a central location -
Umm, no, pocket wizards, anyone?
4) Batteries
-Inability to use a battery inverter on location
-Constant purchasing of smaller batteries -
Rechargeables. Buy a pack of 24 and you're good for a whole weekend of shooting.
-Few or no battery pack capabilities
5) Recycling
-Slower recycle time at the same power output -
Agreed
-Recycle time slows as batteries lose power -
Eh, yeah, to a point (i.e. batteries are almost dead)
-No fan cooling (meltdown or burnout risk) -
Only seen one burn out SB-800 in my time
6) Time
-Running around to adjust settings on each flash -
Not really, Commander mode, man.
-Slower setup time because of extra brackets and adapters needed. -
Nope, disagreed.