This one image is enough to understand.
A Twitter user called @heyBarsee shared this image on Twitter. It compares the output of the exact same text prompt on Midjourney across versions. The date of each version release is under the image.
This is the journey of Midjourney, an AI (Artificial Intelligence) image generator, from February to May 2022 – 4 months in all!
Midjourney is a program that generates images based on text prompts provided by users.