When using concurrently in a project with module set to node16 (or nodeNext) in tsconfig.json, the default export of concurrently is not correct:

import concurrently from 'concurrently'
concurrently(); // This expression is not callable. Type 'typeof import("node_modules/concurrently/dist/src/index")' has no call signatures.

I believe this is due to the fact that the types field points to dist/src/index.d.ts for both the require and import fields in exports, which is not going to work since the files are two different module systems. You can see more compatibility issues here.

I'm happy to send in a PR to fix this in a few days, but I just wanted to throw the issue out there for awareness.