To be fair, it was a distinct diagnosis from autism until relatively recently. It was "absorbed" into autism in DSM 4 or 5.

So if he was diagnosed with Asperger's in the past, he would now be considered to be on the autism spectrum.

That is quite misleading as it has been. It is part of the ASD in these days [1, 2].

[1]: https://rarediseases.info.nih.gov/diseases/5855/asperger-syn...

[2]: Mirkovic B, Gérardin P (April 2019). "Asperger's syndrome: What to consider?". L'Encéphale. 45 (2): 169–174. doi:10.1016/j.encep.2018.11.005. PMID 30736970. S2CID 73452546. "Asperger's syndrome is a neurodevelopmental disorder that is part of the large family of autism spectrum disorders."

It's now considered a autism spectrum disorder, but you could literally have received an "Asperger's Syndrome" diagnosis in the past 10 years.

It IS a "clinically recognized term" in the sense that if you went to a mental health professional and said "I have Asperger's Syndrome" they might say politely "we don't call it that anymore" but it is very unlikely they would rudely say "I don't know what that is, it is not a clinically recognized term."

Some doctors do give that diagnostic.

anymore.