Breeze

The project is described as 'mostly retired,' with only bug fix PRs being reviewed, meaning no new features or active maintenance, which limits its future viability.

The README admits that Scaladoc is 'horribly out of date' and not a good learning resource, making it difficult for users to get started or find accurate information.

On Linux, segmentation faults and crashes can occur due to OpenBLAS threading, requiring complex workarounds like setting OPENBLAS_NUM_THREADS=1 or compiling custom versions, as noted in the common issues section.

Being retired, Breeze may not integrate well with newer Scala tools or libraries, reducing its usefulness in modern data science or machine learning stacks that require active community support.