Thanks for being with Samsung and for sharing your feedback. Sir, Samsung offers you the best value on the product released. Updates are rolling out by time to time for the devices, However it totally depends on the availability and compatibility of the update with the devices. Nougat is already planned for the concern Samsung devices soon these are going to receive a nougat update.
I have to think twice before purchasing Samsung again.. Android 7.0 was promised within weeks time by Samsung store guy now there is no update even after 5 months. This shows how efficient the Samsung team.