Most (all?) 10gbe copper switches will negotiate 1/2.5/5 gbps.
Most 10g switches with sfp+ will as well, but you also have to make sure the sfp+ ethernet module will negotiate lower speeds.I've had some annoying interactions between 1gbps and 10gbps when using different sfp+ switches and sfp+ ethernet modules. I never dug into it, I just swapped stuff around until it worked.
So no reason not to get a 10g switch to start building things out
That's a great rundown with decent logic & examples behind each point.
I think the biggest point is the takeoff weight.
If the impact/evac/safety aspects can be addressed, the only way I can see it working is to add a "cattle class" that's like $10 cheaper than current economy and has something like 40 "seats".Then increase the price of what is currently economy class by $10-20.You lose $400 because of the new cheaper class, but gain $1,200 to $2,400 by increasing the price of economy (considering a 160 seat plane, and convert 40 seats to standing). So, net gain $800-2000. Let's you advertise new cheaper fares, and the price increase isn't hugely egregious when the 40 seats sell out instantly.I guess it doesn't work on less busy flights if only the 40 cheap seats sell