An aspect of 3d abstract forms within a single point perspective space is that it tends to look like a thing, as though it has a physical reality. This link to nature makes it more difficult to appreciate it as
pure abstraction. The power of associative meaning is surprising. Abstract forms conceived in the context of a two dimensional picture plane tends to remain more abstract. It may simply be the case one can relate it more easily to most modern painting.
Some modern artists have tried to exploit abstract forms and 3d space. But with conventional painting the approach to 3d perspective is intuitive. They usually ended up with multiple point perspectives which look like 3d. As a consequence the inaccuracies make them less compelling than what’s possible with computer graphics software.