there is no specific product or technology known as a "subspace vacuum cleaner." It is possible that new developments or concepts have emerged since then, but as of that time, the term "subspace vacuum cleaner" was not a recognized or commonly used phrase in the field of vacuum cleaner technology or any related industry.
If such a device or technology has been developed or introduced , I wouldn't have information on it. I recommend searching for the latest information online or referring to reliable sources to find any updates or developments related to a "subspace vacuum cleaner."