Users of SuperSu might want to hold off on updating things for a short while. Over the last couple days, some people have reported that the latest updates, 2.80 and 2.81, have been causing some issues on specific devices. Problems cover a range of minor inconveniences, from temporary loss of root on some older devices to bootloops on specific phones. None of these should be significant issues for those with the technical knowledge to root their devices, but they might be enough of a potential concern to hold off updating for a bit.
Recent SuperSU releases 2.80 and 2.81 have some issues, Chainfire advises sticking with 2.79 for now was written by the awesome team at Android Police.