It’s not played as a sextuplet but rather a 4:3 rhythm which is hard to do
That's one of the more good comments I've heard in a long time about music.
Although I'm not sure anyone has every played this as suggested with coupled RH and LH in sextuples.
Yeah, that's about right: try it out, just tap your LH in triplets and superimpose a four on top.
That actually works and sounds good, at least to my ears.
No, it's not exactly easy to do, but it sounds much better in my ears than the way it's sometimes played, and to Beethoven's credit, the notation does clearly state this is to have been the case. I prefer to think I've done it correctly, and, indeed, I think most people I've heard do an approximation of this idea.
But it's a fun exercise to perform if one takes a few seconds and tries it out.
No, I have no interest in playing the first movement again, ever, but it is better that way, and it's a fun idea to bring out the percussionist latent in all pianists.
I don't agree that most people play this any other way, but it's a good rhythmic exercise to practice away from the keyboard, particularly if one isn't used to this kind of polyrhythm. Even better is to tap out 4:3 using the RH as a simple guide.