I see in the blog post The Road to Core Solidity that Solidity (perhaps 0.10) is planned to change the syntax for Solidity to match the upcoming syntax for core solidity, including postfix type notation. It’s also been said that Core Solidity will be introduced as a front end in the existing solc compiler.
Is the plan that Core Solidity will essentially slot in as a straight in-line Solidity upgrade, using the .sol file extension, the solidity compiler, and just an incremental breaking version update? Or will it launch as a new file extension?