How do you KNOW all this without actually seeing what the stuff looks like first hand?Sure, a TC can have its benefits and lower your travel and working weight.
But finally it is not the quality I like.
Which does not mean that it cannot be a very valuable a great asset for others.
Sure, any T/S solution that's part of the lens design is going to be some sort of a compromise compared to a high spec view camera and the new digital view lenses ... including this solution. Nothing new there.
It's a brave new world ... and many remarkable things are being accomplished by all the back makers using a combination of mechanical engineering, lens design and software engineering. The past is no indication of what can be ... or even is.