TA-Lib still acts as the baseline vocabulary for technical indicators. New engines may change memory layout, execution model, and API ergonomics, but they often validate against TA-Lib semantics before anything else.
Why It Persists
Researchers, docs writers, and strategy authors already understand TA-Lib outputs. Matching those expectations lowers migration cost and makes cross-framework comparisons easier.
Modernization Pressure
The tension is that legacy APIs were not designed for template metaprogramming, zero-copy views, or compile-time specialization. That forces newer engines to separate semantic compatibility from implementation strategy.
Practical Outcome
The strongest design pattern is emerging as: preserve canonical math, modernize storage and execution. That keeps indicator libraries explainable while still unlocking substantial performance gains.
