Edge case, single-discipline dressage-only store vs full multi-discipline retailer, does Magento still fit?

Yes, the discipline filter is over-engineered for a single-discipline store, but everything else still fits.

Single-discipline (dressage-only, or barrel-only, or eventing-only):

• Skip the discipline-filter taxonomy, the whole store IS the discipline. Save ~$2k of build cost.
• Saddle-fit configurator still essential (dressage saddles run $3,500, $8,500; mis-fit returns are punitive).
• LTL freight still essential if you carry full saddles + boot-trees + show jackets.
• B2B stable layer optional, depends on whether you sell to dressage trainers + barns wholesale.
• Brand portal often only 1-2 brands (Antares + Custom Saddlery for dressage; Crates + Billy Cook for Western).
• Subscription pack-builder optional, many single-discipline stores skip supplements.
• Likely platform fit: $4,999 build is overkill; a $2,500 stripped-down build covers it. Shopify Plus is also reasonable here.

Full multi-discipline retailer (Dover / SmartPak / State Line scale):

• Discipline filter + customer-segment defaults non-negotiable, without it the catalog is unusable.
• Saddle-fit configurator must support multi-discipline branching (English saddles have different fit logic from Western saddles).
• LTL + B2B + subscription + brand portals all in scope.
• Multi-region + multi-warehouse + show-circuit war-room often in scope.
• Custom enterprise quote, $30k, $120k build, 4-6 months. Magento + Hyvä clearly wins over Shopify Plus at this scale.

The honest cut: Magento dominates at $5M+ GMV with multi-discipline + B2B + LTL freight. Shopify can work for single-discipline DTC under $2M. Above $5M with stable wholesale + show-circuit ops, the platform pays back its build cost in the first show season.