Draught trades resistance against stability

Is there a standard draught ratio comparable to length-to-beam, and how has it changed over time?

Not as a simple universal rule: deeper draught trades greater resistance against stability and other design advantages.

Draught is not governed by one simple universal ratio comparable to length-to-beam. Greater draught can improve aspects of stability, but it also places more of the hull in the water and increases resistance. Other design advantages may justify that cost, so the trade cannot be reduced to a single rule. A model-tank demonstration would be needed for a fuller explanation, so the passage remains a concise comparison of competing hydrodynamic effects rather than a complete design formula.