I know there is an azure table storage provider for caching but Azure CosmoDb seems to offer large object sizes and seems to have very good performance.
If there's no feature request for it to be able to measure how much demand there is for a particular feature, it's not being considered.
Thanks Mythz. I found the user voice for it and voted. This used to be called DocumentDB and has been renamed CosmoDb. Just looking for cheaper alternatives to managed Redis in Azure that supports objects larger than 1MB.