Am not OP, and not speaking from direct experience,

but a coworker was using a Pi-2 as a home media server without issue in some situations - basically he did the math on the bitrates per second and determined that the disk/wifi I/O (on the shared USB bus) was fast enough for his use case (IIRC streaming to main TV, possibly 1-2 more devices)

I do know he was looking at upgrading to another mini-arm board with a dedicated PCI Nic or separate SATA due to the bus contention on the USB limiting data/network I/O because he wanted to serve more clients (family of 5 and associated devices)

so I guess the short answer is 'maybe, depending on use case'..