The official guide for Roblox’s branding guidelines contains multiple outdated Studio logos.
The PDF is linked on this page titled “Marketing Materials” under the section “Branding Guidelines.” I find this much more important than any other instance of the outdated logo, because this is the logo that will be used by organizations such as news websites or journalists. Having the definitive guide for marketing be outdated is quite surprising; I’d expect this PDF to be one of the first to update.