Is solid state obsolete?

Let's cut to the chase. Mosfet, Jfet, transistors, are they a past technology like 78 rpm? IC based amps are here and here to stay. Are the days of Krell, Gamut, Accuphase, Clayton, McCormick, Rowland, Boulder, etc. gone? A tube pre amp and an IC based power amp, can it be the best combo? Comments please.