Where are these vintage features nowadays?

I saw this video on some 20 year old 3D software called softimage 3D, and I noticed it had some pretty advanced features that would be useful in blender and other modeling software… I was just wondering why you don’t see things like this…

For example you have the “phantom points” Which predicts the mirror point of a specific vertex, or interpolation point as it would seem.

Here’s the video:

Gotta watch all hour and sixteen minutes to filter for feature huh!