[cyberax]

You absolutely can file multiple concurrent I-485 petitions. I know because I had two concurrent petitions myself: an EB-5 that I filed by myself, and a regular boring EB-2 sponsored by my employer.

However, this will make it almost 100% certain that your interview will not be waived. During the interview, the officer will ask you with which I-485 you will want to proceed.

And you generally want to keep your case as straightforward as possible for quick adjudication, having multiple petitions will complicate it for sure. And the USCIS can take months to do anything as it is.