There are several reasons .
First my wife left me , incl my creditcards and motorbike , lol .
Okay now serious .
I live in a normal housing environment which means I have to be sensible in system volume , if I had a custom room I might have kept the cat and have thought differently , although its more noisy then SS which I don't like , through the speakers as well as the 50 hz transformer hum .
I use the capabilities of my current full range speakers only for maybe 25 -30 percent
Ml amps got me in the high end in the first place , so they have a special place .
Changing gear once in a while keeps it interesting , plus I might need a bit coloured gear to keep CD s listenable
I haven't sold the cat though I might just keep it as well as SS for switching once in a wihle .
Ps I am more then 60 % of the time abroad and sometimes I just want a no nonsense 1 button amplifier no warm up time what ever .
Also I think the better the speaker and the easier it is to drive the more you can skip on amp power and to a certain extent ¨ quality ¨.
The person who bought some of my mdf designed smaller speakers brought a NAD integrated to try with his future purchase , and we also tried it on my XPE speaker.
I was astonished just how nice a 500 euro integrated of maybe 50 watts sounds if it doesn't have to supply a heavy load