The most interesting thing about this is that it may not matter when predicting the behavior of people trying to create private transactions. Meaning: They will go where it is cheapest/easiest to accomplish (some action).
Yes, I know this is not a realistic example. Let’s say we want to make some trade of ERC20 tokens (a la “AirSwap”). We can assume that many bridges from ETH, KSM, and DOT (which we will need to be successful for many reasons, anyway) exist. The users want this swap in secret and may not care which wallet holds the asset after the swap. Well, which chain is cheaper to do the swap? KSM or DOT? That’s all they are going to care about.
I see more “enterprise” types of transactions taking place on DOT because the code there will be more hardened. However, KSM is basically ETH2 before ETH2 will be. If it is interconnected enough, it will be subject to rug pulls and scams and all the nonsense that ETH is subject to, anyway. DOT puts a larger barrier to entry for nonsense, but if something WORKS on KSM, then users won’t care. Things WORK on ETH. You just pay too much to do them.
Whether there are 1 or 2 tokens I don’t think will matter in the end: People will do whatever is cheaper/easier/faster 9 times out of 10.