(Reliable, stable audio performance hampered only by aging UI and hardware specs).

Not officially. Once updated, you cannot revert.

Like most AV receivers, the X520BT warns you sternly: "Do not turn off power during update." This is standard, but crucial. A power failure during this process can brick the unit. If you live in an area with unstable power, a UPS (Uninterruptible Power Supply) is highly recommended before hitting that button.

Headline + Deck