No, not by far. Like with everything else in design, you must use what you use for a reason, and that reason must be that that particular effect brings forth what you need that very moment.
Don't get me wrong, reverb is in my opinion one of the absolutely most useful effects whatsoever, not counting EQ, compressor/limiter and Gate, as they're not effects at all (they're filter and dynamic processors). Reverb is often the one thing to connect different sound so they sound like they're in the same location, and by using more unnatural kinds of reverb, like plate, old digital ones and spring for example, you can make pretty nifty effects on many kinds of non-diegetic sounds.
But it is EXTREMELY easy to mud up the entire mix by slabing on too much reverb, making the entire project totally impossible to mix.
The kind of sounds I think of as best suited for reverb as nothing but effect right now is first and foremost stingers and swooshes. Both non-diegetic, and doesn't therefore need to be based in reality at all. Actually, it's not uncommon that stingers are heavily based in reverb in total, but you must be careful so it doesn't collide with anything important. I got an entire sound effect-disc with swooshes and such from a producer I know (yes, a retail disc bought for money) that I can't use at all as it's drowned in heavy and diffusing reverb :-(
I also sometimes use light unnatural reverbs to highlight specific diegetic sounds, but then I must be very careful or it will sound ridiculous.
I can't say how others do, its all a matter of opinion, but I never ever use reverb on exterior ambiances/BG's, though I have used very light reverb on a few interior ambiances to make them match up better with the dialogue, but that's only if I can't really make it worm any other way. Interior wind will need a reverb well matched to the surroundings, but exterior it att depends on what kind of sound you use to make the wind.
On drones I am VERY careful with reverb, depending on if I use it at all. Most drones are low-pitched and ominous, on these the only reverb I use is mostly the natural one I got in the original files, it's hard to get a bassy reverb to work. It's tricky to get different bass-sounds to come together without sounding bad, in drones I prefer to have the low rumble totally independent so I can have good control over it. On higher drones, on the other hand, I often use different kinds of echo, but then, still, mostly to fatten things up in the more neutral mid's. I hate impulse-reverbs on drones...
This is just my normal way of doing things, there are at least as many opinions on how to do things as there are designers, but it practically always comes down to this; thoughtless and unnecessary reverbs tends to destroy a lot. Use your ears and don't over-do it. It's an art to use reverb creatively, it can both kill a project, but also make it come alive and give dimensions to it. It is indeed an ingredient for giving the project the illusion of unity, but it is nothing but a spice, and like regular spices you must use them with good taste and judgment :-)