Qwen3.8 125B (6B active) Flash-Next

User reports Qwen3.8-Flash-Next at 50-70 t/s on an M5 Max 128GB after upgrading to macOS 27, down from 60-90 t/s on macOS 26. Setup is oMLX with oQ5e quantization. The user reports roughly 20% slower token generation after the OS upgrade and asks whether others see the same.