DYNAMIC RANGE CONTROL

It seems clear to me that most people who write on this forum are more interested by the 13 stops dynamic announced on Monstro Full Frame sensor rather than its size, partly because the use of non PL lenses that we know are so far uneasy to deal in a cinematographic way ( mechanic of focus or/and zoom)

But maybe some of us remember:

Back in 1981 at the Smpte exhibit in L.A. there was on a booth an IKEGAMI 35 video camera on a tripod facing a set
with a highlighted window in a part of it.
At first, the window appeared washed up, like a white rectangle on the monitor.

Then, at the press of a button, you could have details outside the window appear on the screen.
NOT changing anything on the remaining image.

If you pressed the button twice or more, more details through the window would come until their level would reach the level of the" indoor set".
That was almost too much, a creamy look.

Then you could switch back, to get exactly the amount of contrast you wanted.
You could balance the amount of light between outside and inside.
They were using an "electronic mask".
That was more than 25 years ago.

How come we cannot achieve better dynamic control now ?

What about a Scarlet or Epic with variable dynamic before recording ?