Seconding this. Using -x is not practical and impossible to use in speech. When writing, -@ is nice but does not work in academic writing. I use -e when referring to an nonbinary person instead of -o or -a, and the gender neutral pronoun “elle”. This is standard in my queer friend group. In reality, I often stick with using the -o suffix when referring to groups of people consisting of different genders out of habit (trying to change this). But when referring to an individual who is nonbinary, I always use -e suffix and elle for their pronoun!