Since this article's writing, Blizzard has officially released , a separate client for the classic 1.29 version with full LAN and offline functionality. This is a huge step for classic fans and offline LAN parties.
The game engine now handles multi-threaded processing much more efficiently. Pathfinding routines for massive armies—a historical bottleneck in the RTS genre—no longer choke a single CPU core. Warcraft III Reforged V2.0.1.22498-Repack
Are you interested in the technical for this version, or Since this article's writing