Diki,

That's absurd. No arranger or workstation OOTB is setup to change any sound on the fly and have it sit in the mix as you wish with no change in volume, fx, etc. You're dreaming if you think your Roland or any other keyboard does this. You may find some sounds can be changed without much difference, but most or all, utterly impossible. If that were the case you wouldn't even need to mix a songs various parts. Step into reality.

Setting up a VST on a Wersi is no herculean task nor is it difficult to switch sounds on the fly. The Wersi allows you to place VST sounds in program buttons as if they are part of the factory setup. You could go from VST to Factory sound to Akai sample or organ banks and never know which sound is being produced by which engine. Unless of course you checked. It's all pretty seemless.

Every synth, keyboard, arranger, fx device, or other studio gear I've owned I've tweaked to do what I want it to. To presume OOTB they're all going to conform to my needs would be ridiculous. What would be the point of programmability if these things were setup so perfectly from the factory?

I disagree that most keyboards today have great sounds and drumkits that come close to any great VST. Listen to BFD or East West Orchestra and Choirs and show me one keyboard from the big three that can match or rival those. You're not going to find any that come close. Hell, show me any arranger from the big three that rival my Fairlight CMI III drums and I'll be amazed. Sad when near 30 year old technology still makes modern TOTL arranger drums sound like crap.

Modern keyboards may offer more features and polyphony than their vintage counterparts, but sound quality is one thing that hasn't seemed to advance much in most arrangers compared to the best keyboards of 20 and 30 years ago.