It reminds me of the early days of Typescript rollout, which similarly focused on a smooth on-boarding path for existing large projects. More restrictive requi

It reminds me of the early days of Typescript rollout, which similarly focused on a smooth on-boarding path for existing large projects. More restrictive requirements (ie `noImplicitAny`) could be turned on one at a time before eventually flipping the `strict` switch to opt in to all the checks.