...
As for understanding physics.....I think I follow them pretty well...
Maybe- but not English it seems

. I don't see anywhere where I told you or anyone else how to use a flash and specifically don't see any insinuation that rapid shooting is poor technique. We all know it's just bad planning...

Using a flash generates heat, the more it's used the more heat is generated so if rapidly firing shot after shot it shouldn't be a surprise that more heat will be generated than say firing one shot every minute. Keep firing the flash continuously and at some point something has to happen due to the heat build up- either the flash breaks or it shuts itself down. How long it takes to reach this point is where the problem lies. I'm not disputing that this point isn't reached too soon with the SB900 in some instances but there are many cases of other factors coming into play and it does get a bad reputation with people offering comments on threads like 'it overheats' when they've often not even used one.
Is an SB900 an appropriate tool for all? Probably not. Is it unreasonable to expect it to be for the price and current positioning? There's a strong argument that it should be. What they should have done is build an SB1000 with more power, weather sealing, a lighter design and cutting edge heat dissipation then charged £500-600. Or better yet, reposition the entire flash range charging £100 for the SB400, £180 for the SB700, £250 for the SB900 and £320 for an SB1000.
If they repositioned the SB900, a firmware fix option could have been offered for those that wanted to lower the risk of overheating and they could have positioned it at the enthusiast level rather than as a pro level flash for instance.
Instead we get some rubbish rehash with worse recycling carried out to mask any shortcomings rather than design innovation to make sure they don't occur.
Not sure I'm with you on the white flash although I don't despise white Canon lenses as much as I used to

. All Nikon lenses that aren't black look awful. They should be forced to buy them all back and apologise for desecrating them. I'd rather look cool and need a workaround

