I remember Manolis Kellis sprinkled some pretty interesting genomic questions into his Algorithm class's problem sets. There were a number of cool problems about optimally aligning strings, searching within text, etc.
This was like 15 years ago and I haven't kept up with the discipline at all. But is there still algorithmic low hanging fruit?
I do keep reading about an ongoing series of problems with Microsoft Excel distorting analysis in the scientific literature (https://www.nature.com/articles/d41586-021-02211-4) and wondering if the tooling is having trouble..?