Bioinformatics, particularly genetic mapping and population genomics. There’s an entire ecosystem of very mature tools actively maintained by labs to add analyses pertaining to advancements in the field, without breaking pipelines or silently changing the results of a given analysis from version to version.

Take something like adegenet, where the manual itself is approaching 200 pages:

https://cran.r-project.org/web/packages/adegenet/adegenet.pd...