Install on ShopifyOne less toggle, one fewer 404
Bundle thumbnails now always stack by tier quantity, the Product Header preview is back in the block catalog, and the checkout-upsell extension is retired so the install footprint stays focused.
A small follow-up sweep behind today's editor cleanup.
Stack Images by Quantity is gone — and on by default. The setting used to gate whether tier cards showed 1 thumbnail or N overlapping thumbnails. It only mattered when product images were on, and the visual outcome wasn't obvious from the label. Now: if product images are enabled, tiers always render stacked thumbnails capped at 4 (so a 3-pack shows 3, an 8-pack shows 4). One fewer setting to think about; no migration on your side.
Product Header preview no longer 404s. The Product Header block was added without a catalog preview image last week, which made it 404 in the in-admin block library and produced noisy Render logs. The preview is now in place and the block renders cleanly in the picker.
Checkout upsell extension retired. The pre-purchase and thank-you upsell extension is removed. The pre-purchase target had an empty-state render bug, the thank-you target needed undocumented merchant enablement to show up, and neither was meeting the bar. Focus stays on what's solid today: Volume Bundles, page-builder sections, and theme-app-extension blocks. If you weren't using it, you'll notice nothing.