Thanks for keeping on top of us! 
Yes, we have mostly completed our backend improvements. We do have some continuing work to do in this area going forward as well but it will be done concurrently with improvements to functionality. There won’t be any obvious performance improvements from these changes but they will allow us to develop future improvements more efficiently and maintain things better.
The tutor chatbot is under development already and we’re targeting a June release. Otherwise, we’re working on a Library refresh, updated lesson editor and improvements to enhance performance of the web reader.
Along with that, we are working on more general performance improvements and a variety of other smaller things.
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