After a successful first month, sales of the Samsung Galaxy S9 devices have flatlined. Going by the current trend, sales of the duo are expected to peak at an underwhelming 31 million shipments, making them the worst-selling Galaxy S devices since the Galaxy S3 that was released back in 2012.
https://www.notebookcheck.net/Samsung-Galaxy-S9-sales-have-stalled-currently-the-worst-selling-device-in-the-series-since-the-Galaxy-S3.315422.0.html
This makes sense, the best selling galaxy is the S4 at 80 mln, which brought a better screen and same size for a larger display, then the S5 was bulky and ugly, the s6 was prettier but lacked microsd and other features. Then the S7 brought back microsd and offered the best camera, still on the best around and virtually on par with s8 and s9... Maybe this shows people aren't buying the marketing of those useless curved screen that only make the phone more fragile...
S4 was a beast, would have kept using it if not for the bootloader lock, android 5.0 is showing its age