Worth saying plainly: this isn't a registry builder, and it doesn't recommend products, brands, or "must-haves" (plenty of sites already do that, with varying honesty). What it does is treat "start the registry" as one task among the dozens you're juggling, and help you time it sensibly instead of either forgetting about it or starting so early you're revising it for months.
The registry itself lives wherever you choose to build it (a retailer, a dedicated registry site, a shared spreadsheet, whatever suits you). What this roadmap adds is the scheduling around it: a slot for when it's reasonable to start, a reminder to revisit it once you know more about what you'll actually need, and a place for it to sit alongside the rest of the to-do list instead of being its own forgotten tab. Just try it — set your due date and see where "sort the registry" lands among everything else.