Why does LINQ abstraction become a bottleneck in high-scale system optimization?

LINQ abstraction limits low-level control over execution plans, memory layout, and query optimization.

At scale, systems require fine-grained control over SQL, indexing, batching, and memory access. LINQ abstracts these details, which improves productivity but reduces optimization flexibility. Developers cannot always control join strategies, query hints, or memory access patterns, making it harder to tune for extreme performance requirements.