Samsung is still considering Exynos 2500 for the Galaxy S25
The main reason Samsung is installing Exynos processors in its flagship Galaxy S-line series of handsets is because of price. Its own chips cost much less to manufacture than buying a third party chipset like Qualcomm Snapdragon 8 Gen 4 which is rumored to cost up to $220, or about a third of the production price of a high-end phone.