I've been saying for a while that Lambda (and serverless in general) should just be a compilation target, not a Radically New Computing Concept(tm). This is another inch towards that.
I think it is already through libraries. At least for lambda in python you have libraries (Zappa for example) that allow you to write basic flask and Django apps and then deploy them to lambda. These apps can still be deployed the "old" way with no or minor modifications