Is the premise unreasonable? Of course, it depends on what you're doing--there are certainly use cases where you know Python or a similar language wouldn't be a

Is the premise unreasonable? Of course, it depends on what you're doing--there are certainly use cases where you know Python or a similar language wouldn't be appropriate (for performance or other reasons)--but it seems to me that there are plenty of scenarios where using a "faster" language up front isn't warranted, and you may never need to switch.