I am another of the octogenarians still performing. I use both Kn7000 and Tyros 2. Last night I took the KN7000 to a gig in a fairly large hall with my usual extra amplification only to find when I had set up that the amp had decided to give up the ghost. I had to play the gig using just the internal speakers and it worked just fine. How glad was I that I hadn't taken the Tyros.
My only regret is that I do wish Technics had not built this ever increasing weight factor into the specifications of the KN7000. I shall soon have to consider buying a fork lift truck!!

Keep going everyone

Trevor