Specifications itself just confirm why something sounds toy-ish compared to something else. And I mentioned only acoustic pianos specs. It is the same story for every acoustic category - trumpets, guitars, brass-es, strings etc etc etc. It simply can not be compared.
Players buy what hardware manufacturers make. And they make instruments which are strictly locked inside their systems, the same principles for decades. Does it work and gets the job done? Of course it does. Is it anything revolutionary? No. There is no open arhitecture workstation in existence. OpenLabs, Lionstracs, long time gone. MusicComputing - I dont remember anything from them for a long time. The only real upgrade is either a hybrid system (like yours), or go full time vst (like me).
About squeezing pennies. Yamaha’s latest flagship is still based on the same synthesis from 1989 - AWM2. FM exists even longer. AN-x from Montage M (AN imitation) is not the same as AN which existed in Yamaha EX-5 (together with AWM2 and FDSP) and that same Yamaha had also VL, which Yamaha completely abandoned since Motif ES. VL was derivated from VL1 - one of the best physical modelling synthesis ever. Just for reminder - EX-5 is a synth from 1998.
That same (essentially) AWM2 synthesis is in all Motifs - ES/XS/XF and their smaller derivates, and original Montage (which btw has all waveforms from XF). Did AWM2 improve over years? Of course. Did FM improve? Also yes. Is it innovation? No. Is it in essence the same thing as before, or better say recycling? It is. How does it compare to VST world, sonically and techologicaly? It is a joke even to compare them. Even ESP is coded for single core - huge issue for people with lower clock’s on their cpu’s. Maybe that will hurt someone’s feelings - It is how things are.
While VST companies make wonders with deep sampling and modelling - hardware manufacturers are stuck in past, big way. Basically, all of them. The only one who dared to go “open” (and still exists) was Korg, with Oasys, and managed to squize multiple engines to run on a single (pentium) core cpu and 4 gigs of ram, with 10 inch touch screen and glowing faders and what else not, 20 years ago. That is brave. And they still embrace it, with Kronos, but being limited with the same arhitecture from the past, there is no real, massive push forward.
The other “problem” for all of them is giving too much or “everything” to end user (exactly what my Avenger gives to me) - then there is nothing left to sell later. Its basic principle of business. Very similar to a car facelift - minimal change inside and outside, with the same price as original model. Since I made Avenger for my own needs - I can go crazy as much as I want, as long as I can take the investments financially.
To be clear. I personally own both Montage and Modx. Did hundreds and hundreds gigs and concerts with them. Did also hybrid setups with them and GigPerformer. And they all serve purpose. To be fair, all keybords have their own charm and nice sides. But, Fiat 500 is not same as Koenigsegg Jesko. Despite how much the Fiat owner would love it to be. It simply cant be.