737 can withstand landing at full crab angle (35kts), but it has a castering main gear which absorbs the impact. Use the crab technique myself, would be concerned about scraping something with wing down, and pax. don't like it. Also, if x-wind from the left would touchdown on left gear and so no spoilers until right gear touchdown. Have landed with about 15kts of drift on. It isn't pretty but it just kinda skips and alligns itself with the runway.