What are main differences and similarities between portraits in the early days of photography and portraits?

I think the main similarity between portraits in the early days of photography and portraits today is keeping the wonderful and beautiful moment forever. We use our camera to capture the most beautiful moment in our lives. Besides, with the development of techniques, photography’s cultures started to change. Some of the differences between portraits in the early days of photography and today are that in the early days portraits where more exclusive. Portraits where made for wealthy families and highly valued because of its exclusivity. These portraits where also only limited to black and white and depending on the method of development, might have slight tints of other colors. But these days, we can see the various colors, and we will have a good mood to feel those pictures.