A rogue can get multiple sneak attacks per round but only once per turn. Can he use his bonus action to make an off-hand attack then ready his attack action as the next turn is starting to make a main hand attack, dealing the sneak attack damage again? This is assuming that both attacks qualify as sneak attacks
For wording ('perceivable circumstance'), it's easy to simply ask to make an attack when the enemy prepares to do so too, or in tandem with an ally, so there is no problem there.
Of course there are trade-offs, you sacrifice both your reaction and bonus action, rather than simply hoping for an attack of opportunity using your main hand attack. And it also is replaced by the Sentinel feat if the rogue takes it, but otherwise it frees the feat up so a tank can take it to be more threatening