And people have no taste, just like cars more lights mean more bling. Cathodes and LED fans/uv braiding make it look tacky, and make the owner look a right saddo. Being into computers is geeky enough, but messing around with lights is even worse. Ask someone who's not into computers what looks better, a nice black LL case, or a Blade-X case with a police strobe on top.
A clean understated unlit case has far more style than a tacky lit one. It's like going to ballroom dance with a tuxedo, but with a 100 gallon cowboy hat. You have "improved" the tux look with that hat, or so you think. You actually look a prat.
You look at the monitors image, not the computer case. Unless you build a base unit up with tacky 1000W strobe lights without a monitor and just stare at it for hours. I on the other hand look at the screen, and I don't have an annoying light source peering from the corner of my eye.
Side windows are even worse, really what do they do? What is so impressive about drooling over your PCB's and other components?
All of those serve a purpose. Don't compare a nice suit to buying a nice case than ruining it with cathodes. It's like buying a gucci suit but wearing trainers- you look "rad" Or buying a nice presitage car and fitting a whopping 6' high spoiler and under lighting.
Making it look nicer is toning it down, not up.