The mention of syn/serde being a compile time trap strengthens my feeling that having some better tools in the rust standard that make the job of syn/serde easi

The mention of syn/serde being a compile time trap strengthens my feeling that having some better tools in the rust standard that make the job of syn/serde easier (compile time reflection being one of them) is probably the single most important improvement that could be made for the health of the rust ecosystem as a whole. Anything that makes syn and serde run or compile faster will help a large swath of the ecosystem by extension.