It looks like the team has already considered this in one regard
> There is already a precedent for something that Node.js support, that can be upgraded seperately, its NPM. Node bundles a version of npm that can upgraded separately, we could do the same with our TypeScript transpiler.
> We could create a package that we bundle but that can also be downloaded from NPM, keep a stable version in core, but if TypeScript releases new features that we don't support or breaking changes, or users want to use the new shiny experimental feature, they can upgrade it separately. This ensures that users are not locked, but also provides support for a TypeScript version for the whole 3 years of the lifetime of Node.js release.