I'm thinking that this is because there is not a lot of experience in games with jokers.
At least in my case that's very much the reason; in principle the dicussion is very interesting (especially since a game I've been thinking about would involve a closely‐related, if potentially even more powerful (though less apparently‐random) piece)
My impression is that jokers are a bit like Querquisites and Smess/Ivory‐Tower pieces, in that they depart substantially enough from normal Chess dynamics that they'd take a good bit of learning to handle. And in their particular case, the art of dealing with them is in part (principally?) the fact that they reduce the value of strong pieces, especially if well placed: you can't freely move the queen if there's a joker ready to copy its move while still being worth (on average, presumed — though of course this ‘chilling’ effect increases its value correspondingly to the powerful pieces on the board) less.
I'd be interested to see how Jokers handle in games with (a small number of) really powerful pieces. I'd almost predict that capturing the jokers to free the power pieces (with maybe some judicious moves by the latter in between either while the J is still hidden in the setup position, or to give check) would be an important middle‐game theme.
But in any case for now you're probably one of the people here with most experience with the J :)
At least in my case that's very much the reason; in principle the dicussion is very interesting (especially since a game I've been thinking about would involve a closely‐related, if potentially even more powerful (though less apparently‐random) piece)
My impression is that jokers are a bit like Querquisites and Smess/Ivory‐Tower pieces, in that they depart substantially enough from normal Chess dynamics that they'd take a good bit of learning to handle. And in their particular case, the art of dealing with them is in part (principally?) the fact that they reduce the value of strong pieces, especially if well placed: you can't freely move the queen if there's a joker ready to copy its move while still being worth (on average, presumed — though of course this ‘chilling’ effect increases its value correspondingly to the powerful pieces on the board) less.
I'd be interested to see how Jokers handle in games with (a small number of) really powerful pieces. I'd almost predict that capturing the jokers to free the power pieces (with maybe some judicious moves by the latter in between either while the J is still hidden in the setup position, or to give check) would be an important middle‐game theme.
But in any case for now you're probably one of the people here with most experience with the J :)