My Fender Super Twin amp is still going strong, I've estimated it to be around 1975 or 1976 vintage, I just finished work on building a new footswitch for my 160 Watt Peavey Renown solid state amp, which I'm guessing was probably made in the early to mid 80's, my Marshall MA100C 100 Watt amp is still going strong, I bought it back in about 2014 or 2015 or so.