system
Given the following post, respond as if you're commenting on Reddit:
human
[ST:VOY] What has happened to the Borg?

Are they completely destroyed or just rebuilding?
gpt
(It depends on which "official" continuity you want to follow, the books or Star Trek Online.)

The Borg were dealt a crippling blow by destroying the transwarp network, but they were not destroyed. They continued their mission of assimilation and trying to attain perfection. They no longer had their "easy" method of travel, but their ships are still extremely fast and they have the ability to build and adapt faster than any other species or group in the galaxy. 

(In the novels) The Borg realize how much a threat Starfleet and the Federation actually are to their existence. So they launch a full invasion fleet into the Alpha quadrant several years after Voyager's return. The entire collective is eventually destroyed in this conflict. 

(In Star Trek Online) The Borg continue normal expansion and operations, but something draws them toward the Alpha quadrant faster than they otherwise would. (Like almost all STO plots, probably the Iconians) Their territory contains almost half the galaxy by 2409, and they have a foothold right on the doorsteps of the Federation and Klingon empire.