I'd like to point out that this is factually untrue.Equally as important, without Voobly there probably would not have been sufficient demand for User Patch, WK, etc. The select few of us still playing would still be on 1280 x 720 resolution and co-oping games instead of spectating.
UserPatch was always created completely independently of Voobly. It was created by and for AI scripters and modders, neither of which used Voobly. It wasn't created by popular demand, just by a handful of people who thought it would be nice to add more AI features and then went down a rabbit hole of new features to add and bugs to fix.
All of this was done by a community that uses Direct IP over Voobly, and it would have happened regardless of Voobly's existence.