@onepict @jens I've never thought of the Platonic concept of ideals as something to build *on*. For me, it's been more about a framework for defining the thing we want to build *to*.
Sometimes that thing is concrete - a painting or sculpture - and sometimes it's abstract - meet user needs - but it's always about clearly defining and strongly holding whatever that essential goal is.
I'm a roboticist, so I envision the Platonic ideal of my robot and the job I want the robot to do. Refining that ideal into a clear definition is what enables me to make design choices - it tells me what the non-negotiable must-have things are, what the nice-to-haves are, what things it absolutely positively cannot be allowed to do.
Then I build the actual robot, that inevitably looks terrible and is hacked together with hot glue and screws and 3d printed parts in random colors. It kind of a little bit does some parts of the job.
But that Platonic ideal robot is still there, in the back of my mind, guiding my design choices and trade-offs and enabling me to polish my hacked together piece of junk until it becomes a beautiful example of its kind and can actually do the job sometimes.
Having a vision of the ideal is how we get beautiful utilitarian things instead of functional-but-ugly utilitarian things. (The problem being when one person's beautiful thing is another person's horror show.)