For myself I do not fear getting undiagnosed because of the person who diagnosed me and because according to the DSM 5 your old diagnosis is supposed be carried over under the new name. I do fear not being able to get benefits if I want them in the future due to a economic or civil collapse of the USA and the growing consensus here that "High Functioning Autism/Aspergers" is overhyped or never existed at all.
In the end when they look at my age and that I do have a work history the I will have a decent shot at getting them. Who I really fear for is those those have been not been diagnosed yet, especially women.
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Professionally Identified and joined WP August 26, 2013
DSM 5: Autism Spectrum Disorder, DSM IV: Aspergers Moderate Severity
“My autism is not a superpower. It also isn’t some kind of god-forsaken, endless fountain of suffering inflicted on my family. It’s just part of who I am as a person”. - Sara Luterman