Like a few others have mentioned, I do wonder how big the marginal return in baking in these features is.
From a quick look, stuff like FASTA/BAM parsing, translation, etc can be implemented in C-land a la numpy, and called from Python, right?
A language like Swift would also support the addition of powerful user-defined operators, as in the case of Swift for TensorFlow[1].
Language adoption is hard to drive, and I wonder if having domain-specific library calls built-in is worth the added effort for people in the field.