The only disadvantage I may see to this is that it skews your counter of daily cards. So you may feel discouraged if you see that you have a large amount of cards to review and that it will probably take you a lot of time to go through them all, while in fact, you will only spend a few seconds on those that you already remember. Unfortunately, there are times when I cannot for the life of me do my flashcards because there are too many of them to review, and I either skip that day's session because a) I tell myself I don't have enough time (which is a lie most of the time!) or b) I don't have the mental energy to go through them. The only (partial) solution I have found to that is doing them first thing in the morning by trying to plan my schedule accordingly and wake up a tad earlier.
I have configured a review session to be at most 15 flashcards or 5 minutes, whichever is shorter. It usually takes 2–3 minutes. Often I do multiple review sessions back to back. But I'm only ever committing to 15 cards at a time, regardless of the size of the backlog – that is very manageable.
Use the setting to limit the number of daily cards when you find the number bothers you or you’re too busy. You can change it often, too.
A low limit will mean some cards don’t hit on the optimal day, but you’ll eventually have time for every card once enough of them have been recalled a few times.
