Not sure what the article is trying to tell us
The old three-layer architecture of Access, Distribution, Core is nowadays Access and Distribution only - collapsed core model.
Top-Of-Row = Access
End-Of-Row = Distribution
STP blocking on redundant paths (manually for determinism, I prefer)
Terminate VLANs on EOR Distribution switches e.g Catalyst 6500/ FWSM combo or other
Terminate those VLANs directly on a pair of HSRP/ VRRP capable aggregation routers
Terminate L2 and simplify STP as close to source as possible with L3 routing
Also, modern protocols aren't broadcast-based. IPX/SPX, NetBEUI/ NetBIOS are all long-gone. Mapping a /24 to a VLAN is no longer required because the broadcast protocols either don't exist or because servers are much more powerful than they were back in the day. It's all Unicast P2P traffic.
If this article wants to discuss "EAST-WEST" architectures such as you might see with a SAN it should be more about FCoE or newer products/ ethernet fabrics and how that fits into the classical L2 design.
What problem are we trying to solve, here? High-speed switching/ low latency trading applications? What?
Answer that question, provide a solution. Show me.