Samsung recently announced that once the flagship Galaxy S7 and S7 Edge will no longer receive updates
Smartphones Galaxy S7 and S7 Edge, which came out in February 2016, returned to the list of models that will regularly receive fresh firmware.
Of course, updates will not “arrive” every month, but exactly every quarter. That is, the owners of the "oldies" can rely on regular security patches and bug fixes.
But the owners of flagships no younger than the Galaxy S8 and Galaxy Note 8, as well as the Galaxy A5 (2017) and Galaxy A8 (2018) can count on monthly updates.