We originally intended scaling to be a part of 3.0, as it is pretty important for Symbols. In fact, some of the 3.0 betas even shipped with the feature, but we found there were a lot more issues to consider than expected so we pulled it at the last minute so we could ship.
I don’t typically comment on upcoming releases or features, but this will be in 3.5, which is Coming Real Soon Now™. 
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We’re always happy to hear any other feedback or what is considered missing features, it helps us prioritize the work we do!