This question is somewhat related to Can you get Sneak Attack with any weapon as a Swashbuckler?
One of my players is a Swashbuckler Rogue, and we debated if he could use the Sneak Attack on every attack with the Rakish Audacity ability (from the Sword Coast Adventurer's Guide):
In addition, you don't need advantage on your attack roll to use your Sneak Attack if no creature other than your target is within 5 feet of you. All other rules for the Sneak Attack class feature still apply to you.
Here are the Sneak Attack rules:
Once per turn, you can deal an extra 1d6 damage to one creature you hit with an attack if you have advantage on the attack roll. The attack must use a finesse or a ranged weapon. You don’t need advantage on the attack roll if another enemy of the target is within 5 feet of it, that enemy isn’t incapacitated, and you don’t have disadvantage on the attack roll
So, the original ability removes the advantage requirement if an ally is within 5 feet of the target, and the Rakish Audacity removes the advantage requirement if no other creature is within 5 feet of the Swashbuckler.
Does it mean that the Swashbuckler can use Sneak Attack every turn on an isolated target ? (assuming he uses a finesse weapon, of course)
PS: the party is now level 6, and with this ability, the rogue really does a lot of damage compared to his fellows (paladin, cleric, fighter and wizard.. ok, maybe not the wizard, but still)