The help center says:
This is not the right site for questions about:
Etymology, evolution of the English language, or historical English - see english.stackexchange.com instead.
However, there seems to be some interest among the ELU community (myself included actually) in answering some of these questions here instead of directing learners to ELU.
Leaving the exclusion of etymology in the help center just causes confusion when newer members get the privilege to cast close votes, so if we're going to be OK with answering them instead of migrating them, I think we should remove the bullet and keep the help center as authoritative as possible.
Related discussion: What questions of etymology can be asked here?
Just to clarify, I'm not 100% behind etymology being explicitly on-topic, but in current practice it's not being handled as explicitly off-topic, so I think the help center should be updated to reflect reality.