GT is a TB, genetically.
As I said before, in the long run, when you change the selection mode you change the race.
Nearly all European WBs are proof of this. They changed from labor horses to ride horses, and then to modern sport horses. Because the important criteria for labor horses do not apply to sport horses.
And don’t tell me now it’s all because of TB influence. TBs were always used in the European WBs. Sometimes more (late 1900s - after 1960s) or sometimes less (just before WWII).
For the HOL, the 1930s were a difficult time, because the central office for alimentation demanded that the HOL has to become heavier … which he did over a period of years, by changing the selection modus.
So when you change the selection for TBs (and TBs, especially here in Europe are made for running) over a period of x years, you will change the horse.
Because today the criteria for selection are the races. You win that’s good, you win much that’s better and when you win Gr1 races, or more than one, than you are on top and you will contribute to define the type of TBs.
When ND started his career, he was one among others. In the end, with his successful stud-career, he is the most influent TB for defining the actual TB.
All racehorses be they sprinter, flyer, for classic distance or stayer, have to proove their value on the race track. And the racetrack, and the training for the racetrack, define what you are.
So when suddenly, for whatever reason, you decide to take away selection on and by the racetrack, and start selecting on criteria for showjumping (as example) which is much less demanding on the body but perhaps (my point of view) more demanding on the temper, character (calm, not hot, etc), the interaction human - horse, the result in x years will be a different horse.
Evidently, from the body type, a sprinter is different from a stayer. So why not having a TB which ressembles the European WB.
The question is, will this ‘new’ TB still have the qualities the WB-SB look for ?