I just don't have the time for incompatibility for the sake of incompatibility.
You've hit on the crux of the issue with alternatives to MS Office. People expect to be able to open a document to and have it look right, and if it doesn't it's the senders fault, not theirs. In a work environment. That's a show stopper. Sure PDFs are great but if you have to send an editable document your SOL. I used to recommend a free OSS Office product to friends who were sending kids to school since for most of what they needed to do, at zero cost, that solution works as long as they remember to save it as a