Lessons from 50 Construction Sites: Why Mobile-First Beats Cloud-Only in 2026 When we started rolling out digital tools across 50 French construction sites last year, we expected the usual resistance to change. What we didn't expect was this: the sites that went "cloud-only" stalled. The ones that went mobile-first with offline-first architecture thrived. This is a real lesson from the field—not a theory from a VC deck. The Problem with Cloud-Only in Construction Here's the scenario we kept seeing. A foreman with a €2M project is on-site at 2 PM. Cell signal drops (it happens in rural Provence, it happens everywhere). He's trying to update the daily log, verify a subcontractor's arrival, or approve a photo-based reserve lift. With a cloud-only app? He's stuck refreshing, waiting 30 seconds, watching a spinner. By 3 PM, he's back on his van pulling out a notebook.…