Is direct hosting SMB 3.x over TCP standard or optional these days, if optional how do I make my computer use it?

I just came across this page ("Direct hosting of SMB over TCP/IP"). It's quite old, so I can't be sure if it's the standard these days. It refers to disabling NetBIOS over TCP and disabling WINS, which suggests that it's still not the standard or default way SMB works these days, at least in many smaller networks.

Is this page still relevant, and if it is, how do I know whether it's a good idea?

My network here is Win 8.1/10 talking SMB 3.x to FreeNAS 11 (Samba 4.5+) if it helps.

Update:

Based on comments below I've updated the question to reflect the point of confusion:

If it's now standard to disable it, clearly none of the Win 8.1/10 PCs and Server 2016/Samba 4.5+ servers on my local network ever got the memo. (Nor did I.) It's all still running on ports 137-139 despite being 100% modern devices that should apparently be preferring a newer approach.

I can imagine that when NetBIOS over TCP is disabled in a small local network without AD, the host announce/locate functions used to enumerate devices offering shares/printers migrates to DNS (or host file lookup), and the actual client-server traffic runs much as before only on a different port and more modern protocol.

I can add specific hosts to my local DNS resolver and I'm running DHCPD locally, if that helps. I might run RADIUS in future but not at the moment.

On reflection, I'm confused about server enumeration, and what I need to do, to move off the old approach (= changes needed to how I currently configure the clients/servers).

1. How it works? If the old BROWSER functions on ports 137-139 are disabled, how does enumeration by a client of local shares work? Where do available servers and peers offering shares make themselves known? How do potential clients "know" which other local devices offer file or printer shares, and if a device starts to offer a newly created share, or starts to offer a share when it didn't previously, how do existing LAN devices discover this?
2. What changes I have to make, so it'll work that way? On Windows 8.1/10, apart from the checkbox "Disable NetBIOS over TCP", what else do I have to do, to move my local SMB file shares off the old protocols, off ports 137-139, and onto port 445 or whatever the current practice is?