For some reason standby seems like the type of thing that will cause the console to wear out faster, since it's never truly off. That's my main concern with it. Kind of wish the ps4 had the ps3 feature that lets you set a time for the console to automatically turn on and get updates. That's how I would prefer to do it.
The reverse is actually true, the power up and down of a system is the most stressfull time for your PS4 and it is almost always going to develop an issue whilst doing one of those two things. I used to work for Compaq (many moons ago now) and we had machines that hadnt been turned off in 8 years still running, crazy but true.
I leave my PS4 on standby so i can buy games whilst out and get them to instantly download so i can go home and play them right away (usually when im supposed to be working), its also mega handy for updates and patches.