Hello, @stefanolanza . . . the last update in December was a very extensive update which included him being able to show you his capabilities and sing popular songs. These firmware feature updates can take some time depending on the complexity of the features.
These updates come along more frequently than you might think given what they include. Check around on the forums and you can see how much EMO has improved since his creation in 2021.
They will continue to provide firmware features giving him more and more capabilities. You can help out by providing suggestions for what you would like to see for future improvements here.