or extrude/scale and path anim coupled with flow path and diconnection of anim curve. is another alternative.
As is scale along a wire tool that is straight on build. (its actualy a very good alternative for most path anim, it odes not have rotational controll tough but thas easily added with wtist and rotate). Actualy a surface can be used with wrap in same capacity.
Then teres a hardcore option wich uses logic from curve flow and a curve. THis is the mostt versatile but also the hardest approach.