✓ Firmware updatable for ongoing improvements and feature upgrades.
Reasoning
Both sources indicate the Nazgul Eco's firmware is updatable. The oscarliang.com source asserts true with confidence 0.80, and the unmanned.tech source also asserts true with confidence 0.60. Since there is no opposing value, and multiple entries from the same domain are treated as a single opinion, the evidence supports firmware_updatable = true.