I'd be curious about one potential downside to this (v8 specific, maybe others too) Functions that contain a try/catch cannot currently be optimized by V8. If

I'd be curious about one potential downside to this (v8 specific, maybe others too) Functions that contain a try/catch cannot currently be optimized by V8. If we migrate to using try/catch rather than `.then/.catch`, I wonder if there's going to be any perf implications since previously optimizable functions may no longer be optimized.