Well, my mini Mini-PC with Kodi also doubles down as the home NAS so technically I'm not really using SMB for the videos and music anymore, though those files are also shared over SMB if for some reason I want to copy them elsewhere.

That Mini-PC has an N100 CPU which does the decoding in hardware, so it has no issues whatsoever doing it (CPU usage when playing 1080p is less that 10%) hence there really is no point for me in decoding the video files elsewhere and sending over a ton of data raw data over the network - it might even have worse performance.

In fact that Mini-PC is also my bittorrent server with an always active VPN and it's connected to the fiber router with Gigabit ethernet, which on the other side connects to 1 Gbps fiber to my ISP, so the whole thing is pretty performant (and even with all that CPU usage is still pretty low).

Streaming can make sense if you have multiple TVs or devices and you want to share sessions across (i.e. watch a bit in one and then continue watching in a different one from where you stopped), but for a single device setup, not so much IMHO.