How do I handle pre-order abandonment?

I run a boutique fashion brand that specializes in limited edition collections, and pre-orders are a critical part of our business model. Lately, I've been noticing a frustrating trend: customers are initiating pre-orders but abandoning their carts midway through the process. These aren't just random browsers—these are customers who are genuinely interested in our upcoming collection, who've taken the time to select items and start the checkout process. Each abandoned pre-order represents lost revenue and potentially lost customer enthusiasm. I've tried generic discount pop-ups and email reminders, but nothing seems to consistently convert these hesitant pre-order customers. The stakes are high because our limited edition pieces have production costs, and every pre-order matters. I need a sophisticated strategy that understands why customers are getting cold feet and can provide a targeted, time-sensitive incentive that feels personalized and genuine. It's not just about throwing a discount at them, but creating a sense of urgency and exclusivity that makes them feel they'll miss out if they don't complete their pre-order right now.