The Samsung Galaxy S8 and S8+ have now been relegated to quarterly security updates
Samsung typically provides four years total of updates to its flagship phones. The Galaxy S7 and S7 Edge finally stopped receiving updates a few months ago, and the S8 and S8+ are set to join their predecessors as they've now been relegated to Samsung's quarterly update list.
Samsung released the Galaxy S8 and S8+ back in 2017, three years ago. The phones ran Android Nougat at launch and received two promised major OS updates: Oreo and Pie. Until now, they've received monthly updates, but will henceforth only receive quarterly patches.
Samsung's software update policy for its flagship phones is simple: two major updates, three years of monthly updates, and an extra year of quarterly updates. The S8 and S8+ have now entered the last part of that period. This means that in a year, Samsung will end support for the phones. The S8 Active remains on the monthly update list, as it was released in August. Likewise the Galaxy Note 8.