I have done very strict single POV, and I hate head-hopping, but multiple POV's can enrich a plot. I have two main POV characters. In their debut novel, the primary one is in a state of deep depression for most of a few chapters, so nobody would want to be in his head for very long. Most of the time, I alternate between the two because 1. At first, they haven't met yet but I want the reader to feel it coming, 2. The way they perceive each other is interesting/amusing, and 2. One is in a bad spot and the other is concerned about him. It is similar to how one might handle a romance, but it's male bonding.
I use several other characters' POV for brief scenes when a lot is happening in a short time. The different views of the same time period have cliff-hangerish endings that finally resolve. I think the converging scenes heighten suspense, besides adding details that come in again later.
A few alternate-POV scenes are there to show off the bad guys. Some scenes also provide cultural background through character thoughts and actions rather than info-dumpy explaining.
I was a little alarmed when I counted up all the POV characters--nine! There are a few times when I go omniscient without dipping into any heads. At the end of a scene or two, I make what I call a soft transition. The POV character leaves the scene but the POV stays behind, and another character has the final moment. I wouldn't advise doing that a lot, but it seems to work in small doses when it adds something and that something isn't worth a scene of its own. My betas haven't mentioned it....
All I do has been absorbed in many years of reading, and observing how other authors have handled things.