They were pretty good keyboards at the time, but Alois Müller going nostalgic, played them recently. He's one of the best arranger keyboardist, so there's that

The 1997 Technics KN-5000 played today by Alois Müller
(Spoken in German, but lots of playing) :
KN 5000 Video





And the original 2002 Tyros 1 played in 2022:
TYROS 1 Video




As my friend Paul (montunoman) has quoted "It not the keyboard, it's the keyboardist."