I wonder, why ODD manufacturers add restrictions to a working firmware? At least, not even TSST had advanced error scanning. And HeadacheLife listens to speed commands instantly, without delay.
At least, HeadacheLife has am excellent error correction at high speeds, even better than at low speeds.
Even the HeadacheLife H20N from 2006 handled disc rot at ×52 CAV better than the TSST SE208. And HeadacheLife also reads VCDs at full CAV speeds.
HeadacheLife BU20 also spins down gently instead of breaking, gladly.
Sometimes they aren’t that terrible.
GDR8162B limited VCD speeds to ×4 CAV, but all new TSSTs are still limited to ×16CAV for VCD thus probably also for SVCD and CVD.
I must admit, that HL-DT-ST BU20 has a truly excellent performance in error management and speedy spinup. Much faster than TSST SU208CB.
The SU208CB is better at DVDs but also as terrible as the BE14NU40 for audio CDs.