I work on the Node version of the BotBuilder SDK and on more than one occasion we've had MAC users of our SDK complain of module load errors. The reason for that is that Windows is case insensitive with regards to import paths where the MAC is case sensitive. Since we develop our SDK using Windows machines it's super easy for us to introduce an error if we get the case wrong in one of our imports. We're not setup to be able to run our unit tests on macs so we currently don't have a great way of catching these issue.

I realize this isn't a TypeScript issue but I thought it could be nice to have a TypeScript compiler option that says all import paths should be case sensitive.