The refactor changes the structure to `if span_streaming: ... elif current_scope.transaction is not None:`. When span streaming is enabled but `current_scope.streamed_span` is not a usable `StreamedSpan` (e.g., it's `None` or a `NoOpStreamedSpan`), the inner branch is skipped and the `elif` is never evaluated, so `current_scope.transaction.update_active_thread()` is no longer called. Previously the equivalent fallback path executed whenever the streamed span check failed. As a result, profiling thread updates can be silently dropped for sync Starlette requests when streaming is enabled but no streamed span is active.