The debate about ground fighting is a non starter in my books. No martial art is the final solution. If you want groundwork study some Gracy techniques. It’s up to you to decide where you need to improve.

Wing Chun is an excellent in your face, keep the other guy from hitting you while you tie him up long enough to hit him kind of art.
Great stuff to know but if you think you’re done once you master wing chun think again.

At first any martial art is a revelation. After a while if you really study it you see the gaps in your technique and it is up to you to find the next martial technique to study to fill those gaps in.

One last point. If all you ever encounter is other martial artists using the same style your gaps will not be apparent. Gotta get out more.

Next comment: "Getting a WC master to the ground is not [...]"
Previous comment: "wing chung as self defence ? well yeah : [...]"