I mean, the BEAM doesn't have global GC pauses either, as each process has its own heap - but I would expect Pony can take things a step further as a result of its strong type system, which IIRC is why it can support zero-copy messaging.
If one can avoid GCs altogether a-la precise (de)allocations like Rust's non-reference-counted entities, this is cool but often requires unnatural contortionism. RC is still necessary in certain cases.