1. Several important statements would benefit from stronger and more specific literature support. For example, the sentence “The emergence of floating offshore wind turbines (FOWTs) further introduces platform-induced motions and additional dynamic loads, amplifying the operational stresses on critical components” should be supported by relevant and up-to-date references that explicitly quantify or demonstrate these effects.

2. In Section 1.2.2, I recommend restructuring the discussion. It would be clearer to first summarize the main failing components and dominant failure mechanisms that are common across wind turbines in general, and then explicitly highlight the additional or emerging challenges specific to offshore and floating offshore wind turbines (e.g., harsher environments, coupled dynamics, accessibility constraints).

3. While the manuscript provides a comprehensive overview of existing condition monitoring (CM) techniques, the discussion remains largely descriptive. The authors are encouraged to more clearly articulate the methodological novelty of this review and to emphasize recent or emerging CM paradigms rather than primarily consolidating established approaches. 

4. The current structure follows a technology- and method-centric organization, which makes it difficult to identify the underlying review logic. Reorganizing the manuscript around key CM problems (e.g., fault detection, diagnosis, prognosis, and decision-making) or fundamental challenges (e.g., data scarcity, generalization, interpretability) could significantly improve clarity.

5. Section 1.3 provides a solid conceptual overview of digital twins; however, it remains largely at the framework and terminology level. A more critical discussion comparing how different modelling strategies (data-driven, physics-based, and hybrid) actually improve CM performance would strengthen this section.

6. The SCADA-based CM section is extensive, but it does not sufficiently discuss fundamental limitations such as limited observability of early-stage mechanical faults, temporal resolution constraints, and confounding environmental effects. Explicitly addressing what SCADA-based methods cannot reliably detect would add critical depth.

7. While prognostics and remaining useful life (RUL) estimation are mentioned, the manuscript does not adequately analyze why these methods are still rarely adopted in industry. A discussion of challenges such as uncertainty quantification, validation difficulty, and integration with maintenance decision-making is recommended.

8.  Although offshore and floating turbines are referenced throughout the manuscript, their CM challenges are not systematically contrasted with onshore turbines. A clearer and more explicit comparison would help readers understand what genuinely changes for CM when moving from onshore to offshore and floating systems.