So how many people are using subwoofers

I am using 2 Vandersteen 2wq subs with  Gradient revolution speakers (passive version ) with good results. 

I used a single REL Q150e (150 watt 10") for years with no need for a digital room correction sound nanny (I think they can cloud things with more crap in the mix, plus my largish room has a tall sloping ceiling so it sounds good anyway) as I turn it up or down if needed (easy, and not so often). The mains run full range of course (a REL thing) and it all sounds amazing…got a second REL recently (Q108 MKII) from the same vintage and man…simply better…"charging the room" is part of what they do as that sense of low ambience is part of the natural sound of the world, and should simply be there. I turn the subs down to demo this for friends and they agree with me, and think I'm a wonderful person with great taste.

 i have a mMartín Logan dynamo 300 as a complement to a paradigm studio 20 v5, very musical bass, enough for my space. More details on my system description.hope yo help you

I'm using a pair of Shelby+Kroll monitors and matching S+K subs. I found the Dapeaker Dual Core 2.0 to be very helpful in taming room nodes. The bass sounds awesome and by clearing it up the highs and mids significantly improved. 

I just added a svs 12" sub (sealed) to my pair of rega rs5.  Crossover set between 60 and 90hz on the sub depending on my mood, no cut-off on the regas.
very enjoyable, i may add a 2nd one later.  I used to have vandersteen 2s sig, but now, i can customize the output.
i have always been reticent about using a sub because i thought good integration could be difficult to achieve.  Well, This was a false belief.  I actually may actually switch to true high-end bookshelves at som point.