Over the years there have been many attempts at “improving” the piano. One such experiment was to replace some of the wooden action parts with plastic. It didn’t work, they cracked with age. (If you own one of these pianos, you might want to check out Piano Tuners to get it repaired or even Piano Dealers to replace it).
There were many other ideas that tried and failed including the Jensen piano which had 2 keyboards, a vertical grand, one that had a keyboard that was more like a typewriter and many others. - Piano Sheet Music