How much upkeep do permeable pavers need to keep draining?

Permeable pavers let stormwater pass through open joints into an open-graded base, while conventional pavers generally have tighter joints and rely more on surface grading to manage runoff. How much does the soil below affect whether a permeable system makes sense? If it infiltrates slowly or stays seasonally saturated, does the design need an overflow route or other provisions? And how much work does replenishing joint aggregate add compared with maintaining a conventional patio? I’d be interested in how people weigh the drainage goal against site conditions and upkeep.