The antonyms of the word "downgradings" would be upgradings, promotions, advancements, elevations, improvements, or enhancements. These words are opposites of downgradings, which means a decrease in status or quality. Upgradings refer to the process of improving, while promotions and advancements both suggest a move to a higher position or rank. Elevations can also describe a rise in status or position. Improvements and enhancements imply a positive change in quality or effectiveness. In contrast to downgradings, all these antonyms suggest a positive change, progress, or improvement.