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by wongarsu 1461 days ago
Most images are still JPEG (3 decades old) or PNG (2.5 decades old). Countless better formats have been developed, but with the exception of WEBP we are still using the same image formats that existed during the dot-com bubble. Ubiquity trumps improvements in image size.

Better encoders for JPEG or PNG are the main avenues how you can achieve improvements without compatibility problems, and I think that will stay true for another decade, if not more.