Read the following passage:
Early attempts to harness tidal currents for municipal power generation in coastal estuaries often encountered severe mechanical fouling from marine organisms and saltwater corrosion. Although modern composite turbine blades and cathodic protection systems have significantly reduced wear, deploying submerged generation arrays remains an economically precarious venture due to unpredictable maintenance cycles. As a result, while engineers acknowledge the vast kinetic potential of oceanic tides, energy planners remain guarded regarding the immediate commercial viability of large-scale estuary arrays.
Statement: Based on the passage, the author's tone toward the near-term commercial implementation of tidal energy arrays is best described as cautiously reserved.
Answer: Answer