The PS4 will boot up into recovery mode to verify that no data was corrupted then it should boot up normally. However, there are problems with using rest mode mainly to do with unplugging the console or a potential power outage whilst the console is updating What Happens If Power Goes Out While PS4 Is In Rest Mode? To see all the cool reasons to use rest mode, and how to cut rest modes energy consumption in half check out my post here. You only have to see the numerous Reddit threads like this one where users have left the PS4 for weeks to years without any ill effects.
If rest mode was bad for the PS4 why would Sony specifically create a feature that uses the feature? Beats me. The PS4 has an auto-update feature that automatically downloads games and updates even whilst the PS4 is in rest mode, saving you the gamer tons of time as you don’t need to wait for your game to update! Sony designed the PS4 with rest mode in mind, you know why? Project 24 It Changed My Life Why It Is Not Dangerous To Leave A PS4 In Rest Mode
