Surprised nobody's built such a thing before for eg. churches where a piano or organ will be permanent. Such a beautiful instrument and obvious in hindsight.
There are many custom-built organs that defy logic.
Here in St. Louis, the organ at the Cathedral Basilica of St. Louis was built over decades, and one of the ranks (sets of pipes) has pipes that are so long, they were formed in a semi-circle so they would fit within the building.
One of those pipes (a low note) was stuck on one time, and it caused a bit of a vibration in the whole place, and the organist had to turn off the pipe organ until someone could come fix the broken valve!
But it's amazing seeing how there were pipes jammed literally in every nook and cranny and closet in that place—and from what I hear that's not even that massive an installation!
