In the US at least, the limit applies to containers that hold more than 3oz. So I'm prohibited from bringing an 8oz toothpaste tube with an ounce or less left in it. This is an inconvenience if I want to fly for a multi-day trip without checking any baggage.
Once the restriction was added, it seemed like "oh no how dare you" but in reality, I'm never carrying enough toothpaste to make this a problem.
Are other people truly struggling with this limitation? Feels more like a perceived issue than a practical one.