There isnt a limit within reason
If youve learned your craft, you'll know what you are capable of.
I used to see heavy weather and be doubtful, but after many years of seamanship, and particularly with ribs, i have a great deal more confidence.
That said I'm not daft, and I dont take risks with my crew or company, but in the company of fellow enthusiasts, and a good modern hull, you can enjoy some seriously fun cruising