How many navmesh agents can Unity’s pathfinding system handle effectively?
This depends on your computer, in an offical unity benchmark on chrome (the webGL benchmark) my browser (chrome) with a Dual core 4GHz CPU handle 1320 navmesh agents before go lagging (<30 FPS). Generally unity can handle a lot of nav mesh agents alone, but if your code is unoptimized (no coroutines, lots of calculations on Update function and FixedUpdate and similar) the maxium number will go down.