I can guarantee you that the sampled Yamaha CFX grand which is in YDP-184 is but a small fraction in size compared to model of Yamaha CFX sampled by Garritan at Abbey Road Studios. And sounds like shit in comparison.

The Garritan CFX full version (with near and far mics) is 132gigs in size, and even if you take only one set of near/far microphones, it would still be ~40-41gigs in size.

Obviously bigger isn't always better, and there's a diminshing returns point... however, digitial piano sample sizes don't come even remotely near it.

I would be surprised... VERY surprised if the sample size in YDP-184 would reach even a single gigabyte.

More realistically, the piano sounds in YDP-184 is in megabytes. It has been like this with digital pianos - with very few exception models - for decades, with little to no progress.

If a digital piano manifacturer doesn't specify sample size in megabytes/gigabytes, it is most likely because the samples are embarrassingly small, short, looped and stretched.

Disklavier you linked is not a hybrid or a digital piano. It's a real acoustic piano with playback system.

The hybrids - Yamaha N-1X Avant Grand, 7k euros, Kawai Novus NV-10S 9k euros - have great piano action, but the sound is still pretty embarrassing for the price you pay for it.

If I had Kawai Novus-10, I would still hook it up to Garritan CFX, because built in sounds in it are pathetic (for the price)