New Grand Piano ?

Take a look at the whole selection of Pianoteq instrument packs - you can't say there's no well known pianos or pianos similar to real world instruments. Don't forget the packs and freebies - to perfect the tech, all these have been re-created. It's an astounding output for a small team.

I don't want to offend anyone but it strikes me that there's a lot to say about that.

The future = digital working with manufacturers of real world instruments and the digital products become historical documents - much like you see a museum piece - in future, these brands will be remembered (and stay alive) across time because they are also living in the digital space. That may sound like marketing talking but it's been evangelised for decades, I'm only living through it. It's happening if I like it or not. I do. This already is reality but Modartt is in the lead by all measures in that regard IMO. I think they're the only rational choice for a piano manufacturer to digitise with.

Patience, and time.

Many points.. some well known piano makers may have more in-house and protective policies than others - maybe they manufacture their own electronics/keyboards etc. so supplying an official pianos to Modartt for accurate digitisation might be something that their management might need to come to grips with. Maybe they make a rational choice to not do this at this time. It's all OK and fine. I would however invite any piano manufacturers to participate. History is being made and I feel they miss out. Just my opinion.

With Pianoteq Pro, you can edit an unlimited number of realistic pianos - pick a length for your strings, material impedance and get as detailed as you want - you can make a Martian Titanium piano with tomatoes for hammers if you want. But more to the point, you can make your very OWN piano sound - great if you're a musician and want a signature sound. Your imagination is the limit. Anyone who can't make a piano sound a certain way with all the freely available products around, might not be up to understanding this terrain.

All things considered, I think the selection is exceptional and improving year on year. There will surely be more piano makers to come. I have the Studio bundle - all pianos plus new ones for a time after. Worth it.

"why not make all famous Grand in the world first":

Steinway is no small name. 2 of their most famous models. Grotrian and Bluethner are exceptional pianos.

There is K2 "created from scratch by the Modartt virtual piano factory, combining the best elements of several source pianos". I've played Shigeru Kawai IRL - this is close but feels lighter and more resonant in a different way to me - more playful. I would dearly love it if Kawai would offer a model such as Shigeru for Pianoteq to really exact it - certainly. I own Kawai MP11 - that would make my day.

That kind of thing may be more a matter of time, or a matter of a deal - you can't just make everything happen all at once. Both Modartt and Kawai need to meet, sign, experiment, create, fine tune, test, release. Just like all other pianos. There are only so many people and only so much time in a day/week/year etc. Again, comes down to patience dear reader.

Onward - There is YC5 "modeled from a well known Japanese grand piano" - I think that's as much like one you'd like. Again, would love Yamaha to offer a model or two for exacting official digital models.

It all takes time - and right now, the modelling is getting so much closer to "Well I can't believe it's not a real piano!" that, I can only hope as an avid consumer, that I will be able to purchase more Modartt produced official piano models always. It's maybe OK to be impatient but this will come to pass over time I believe - unless piano makers themselves fail to wish for their sound to survive into the often misunderstood digital marketplaces. There will always be pianos tweaked "like" those - but it's just a whole other level with manufacturer support and encouragement - a real masterpiece is created that way.

Modartt had doing quite good, keeps almost "original taste" of grand. But one thing maybe they did not spend much time yet is emulate Microphone. Miking inside piano arena is pretty good, but miking outside in room is not right. Seems like just delay of close mic, it's not have some "blur", "smoke" rooming sound. I know we can replace by reverb plugin or something, but reflection of room is so different.
And for extreme "real" I think Modartt should add some "enviroment noise" will be perfect.