[sundar22in]

The benefit i see by using git-backed wiki is that your data is not locked into any database/site. In the end they are plain text files and no dependency on database (e.g. myql), and no dependency on git-hosting site. If you dont like github, you can host your wiki else were.

[SonicSoul]

doesn't that make your data less accessible/queryable?

[sundar22in]

Yes, in the end making a choice is about making a trade-off. If we need easy to query data storage then RDBMS are better.