I think a lot of it has to do with the availability of disposable income. There has been a dramatic increase (except for mine ) in the last few years. Look at all the bling bling crap that's for sale. Stuff that does nothing but look flashy.I think there is a line of departure between a DIY home built amp that works well and a botique amp with flashy plating and or wood panels that produces the same quality as the DIY at 12 X the price.
I'm not knocking nice looking VS utilitarian. I do think that there are too many folks investing way too much ego into audio. Audio equipment is for the playing of music. Not to sit and worship the equipment