I'm not familiar with TypedClojure or TypeScript, so I feel unqualified to answer your question. I'll attempt to answer anyway, because this is the Internet.
At first glance they seem like subsets/dialects of other languages, which would reduce the benefits they get from their "parent" ecosystem? Similar to JRuby and Java, where I always felt a reluctance to interact with the Java side.
That said, Dylan has a pretty neat FFI, and it's simple to wrap C libraries into Dylan-looking interfaces, so at least for me it benefits a lot from the plethora of C libraries out there.
(I realize FFI is available to almost all languages, and doesn't really mean libraries are available to Dylan, but I find it very comfortable to bridge C and Dylan through its FFI.)
At first glance they seem like subsets/dialects of other languages, which would reduce the benefits they get from their "parent" ecosystem? Similar to JRuby and Java, where I always felt a reluctance to interact with the Java side.
That said, Dylan has a pretty neat FFI, and it's simple to wrap C libraries into Dylan-looking interfaces, so at least for me it benefits a lot from the plethora of C libraries out there.
(I realize FFI is available to almost all languages, and doesn't really mean libraries are available to Dylan, but I find it very comfortable to bridge C and Dylan through its FFI.)