I know that in the past companies that used asynchronous logic tried to hide that fact - because of unproven technology,tools,etc - even if it worked great.
Now they overuse the word "asynchronous" as a buzzword - as if it'd give some advantage.
I think it's misleading. First, there are several very different approaches to design asynchronous logic. Second, it's likely that the design has some synchronous logic, so it's not entirely asynchronous.