I'm hoping this whole shouting thing is not a trend.
While I think just about everyone will agree a well mi'c decent amp will provide a better end result than even the best amp simulation. - sometimes I mic'd amp is not a feasable solution.
I own a POD 2.0 a J-Station and a V Amp as well as several small wattage cabs. When I can, I prefer to mic a cab - but I live in a condo and there are many times I simply can't be blasting an amp so I then use simulation.
If it's a critical guitar part or the guitarist/client absolutely insists on mic'ing a cab, I either schedule the session for a time when we can crank up - or I simply suggest they record somewhere else.
As apl suggests, sometimes good enough has to take the place of perfect.