Use for objective evaluations and assessments of API, plug-ins, frameworks, etc. (i.e. should not be opinion based for formal answers, but based on structure, architecture, and validated performance.) Opinions may be suitable for comments, but not for formal answers.
The idea here is that these APIs, frameworks, etc. are "known quantities" and therefore can be objectively assessed.
Even in the case of "black box" software, performance can be rated statistically.
Distinct from "Software recommendations", although there may be some overlap.
With so many options, it is useful to get analyses backed up by facts and data.