Many higher end preamps are dated and ugly, why is this?

Conrad Johnson, BAT, VTL are all very good preamplifiers, they are dated and just ugly.  Audio research is a prettier amplifier but it's not very well regarded due to it sounding more like a solid state, ie. Not really a tube preamp despite all those internal lightbulbs.

Cheaper preamps can be more pretty. Schitt makes a pretty preamp for about $1000. People like pretty.

D'Agostino by many is viewed as very attractive but kind of weird.