Getting a non-.com domain is like that, it seems amateurish and somewhat unprofessional. There are .com domains if one is willing to be creative and settle for something that is not a simple dictionary word . The length doesnt matter as long as the word is reasonably memorable. 'facebook' and 'instagram' and 'snapchat' did not have a problem with their name. If they 'd gone for face.book, instagr.am snap.chat etc people would be confused "how do i access this site". The dot is not part of our mental dictionary.
Some of them look even dangerous. for example MS onedrive links are from "1drv.ms " which makes my emails look like phishing scams.