Reliability of crypto off-ramps and multi-broker liquidity for larger orders

Been thinking a lot lately about the infrastructure around crypto trading, specifically when trying to move significant size. The on-ramps generally work fine, albeit with varying fees and KYC hurdles, but off-ramping reliably and quickly when dealing with anything north of six figures continues to be a point of friction. It's not just about the exchange withdrawal limits, but the actual banking relationships and liquidity on the other side.

Anyone else experiencing consistent headaches here, especially when you need to execute a larger block order without slippage across multiple brokers or convert back to fiat efficiently? What kind of due diligence are folks doing beyond just checking basic withdrawal limits and fee schedules to assess a platform's real-world capacity to handle substantial capital flows, particularly during volatile periods? Seems like this is where the smaller players really show their cracks.