Nifty idea, but I think those who enjoy tubes already know the sound they like best and have bought appropriate tube gear. Not at all certain as to what’s involved technically to mimic the harmonics of a myriad tube types, but it could be a lot of R&D and manufacturing loot for a device that would most likely see limited sales, relegated to a very small percentage of the world’s consumers. But, if you charge enough and people are willing to pay for it...
High risk, though. Maybe.
Can’t win a prize if you don’t buy a ticket!
Then again, can't lose your ticket money if you do and lose.
Can you tell I had waffles this morning?!