PySwarms

The creator explicitly states no active maintenance, recommending scikit-opt instead, which risks bugs, security issues, and lack of updates for modern Python versions.

Focuses solely on particle swarm optimization, making it unsuitable for projects requiring genetic algorithms, simulated annealing, or other metaheuristics.

With no ongoing development, dependencies like matplotlib may drift, and documentation could become stale, complicating long-term use.

Not optimized for high-dimensional or real-time optimization; the visualization and abstraction layers may add overhead compared to bare-metal implementations.