Workflows 1.0: A Lightweight Framework for Agentic systems (llamaindex.ai)

I notice that the python versions and typescript versions are pretty different. Python is sort of class based, with python magic decorators

    class MyWorkflow(Workflow):
        @step
        async def start(self, ctx: Context, ev: StartEvent) -> MyEvent:
            num_runs = await ctx.get("num_runs", default=0)

whereas TS is sort of builder/function based

    import { createWorkflow } from "@llamaindex/workflow-core";
    
    const convertEvent = workflowEvent();
    
    const workflow = createWorkflow();
    
    workflow.handle([startEvent], (start) => {
      return convertEvent.with(Number.parseInt(start.data, 10));

Is there reason for this? });