I love my wocs. I have 3 and they are one of the styles I use the most out of all my chanel bags. I don't carry much (only flat card wallet, lipstick, and phone - samsung flip z) and if I do need to carry things, I will put it in my pocket. I have 2 kids (6 and 8 yo). It's very versatile... carry it around anywhere, goes well in any setting (dressing up or down), and easy to travel with.
I think the reason why a lot of people sell it is because they realize it's too small for them or it is the first bag they bought because it was the most affordable bag they could buy (especially before chanel started selling all the other small bags) and it's a classic. Also, people sell so they could fund a bigger bag. Woc was my second chanel bag that I added to my collection, so it was a perfect balance. Mini CF was my first but I started collecting 10 years ago so Mini CF was only a little bit more than WOCs and very affordable back then as it was not a popular bag. I actually use my Wocs more than my minis CF too.