Played one... Nothing like the originals.
TBH, not all THAT impressed by the Kronos. Still sounds like a Triton/M3/Karma follow-on. In other words, it sounds like a Korg, not a Clavinet, B3, Rhodes, Crumar, etc..
The thing is, it isn't just the SOUND that makes older keyboards still relevant. It is their quirks, how they weren't always perfectly in tune, how some notes would wolf out, or do weird things. It was how, with older synths, you never got the same sound twice, because you couldn't store a preset... all too often, I would find a great sound because I couldn't quite get the sliders and knobs to EXACTLY the same place they were before. Once you get hooked on presets, the number of new sounds you create drops to almost zero.
Plus, to me the thing that made them so great was the keybed and the physical layout and feel of the keyboard. There are things you can do on a Clavinet keyboard you would never do on an arranger. There are ways of playing the B3 waterfall keybed that don't work on most arranger and synth keybeds. The weight of the action, the way it rebounded, those helped you play stuff that is quite difficult on todays vanilla keybeds.
And the response time... Nowadays, we are used to a few milliseconds from playing the note to hearing it. On the old electromechanical keyboards, it was microseconds! You really felt 'connected'.
Modern keyboards have convenience, but the old ones had character.
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An arranger is just a tool. What matters is what you build with it..!