To clarify the wish expressed in the OP I’d like to see the existing stand design extended the full length of the stowed TextBlade and appropriately stronger.
To be fair, the existing design is like a lot of the
Textblade, ie the absolute minimum physical size that still does a good job of it’s intended purpose.
A quick test with a heavy old iPad 2 with wedge of paper folded 16x to give it a more upright posture shows the existing stand will hold it up ok. In this state it can even withstand light taps to the upper screen - bit of a wobble but without keeling over backwards.
It works but its not secure enough to call it a reccomended use.
If I were frequently using a tablet in portrait like this I would be tempted to put some little rubber bumpers on the corners of the tablet to limit the pitching left / right.
Using a normal size tablet in portrait is appealing also because it raises the eyeline.