https://phys.org/news/2018-08-maximum-atlantic-tropical-cyclones-year.html

They found the record number of tropical cyclones that occurred in 2005 (28 storms) is close to the maximum number that might occur in this region given existing climate conditions. This information is useful for risk management because the year 2005 has already been extensively studied and its tropical cyclone hazards and risks to infrastructure are well known. Thus, it could serve as a tropical cyclone risk benchmark for future hurricane seasons in this basin.

The year 2005 was certainly the biggest year for tropical storm and hurricane numbers in the Atlantic since the 1940s and, by some measures, the biggest for at least 150 years. There were so many tropical storms in 2005 that the U.S. National Hurricane Center ran out of tropical cyclone names; by late in the hurricane season, they resorted to calling tropical storms by letters of the Greek alphabet. It is of considerable interest whether a year like 2005 might occur again, and how often, not only for hurricane forecasters but for emergency and risk managers throughout the North Atlantic region.