App marketplace, Shopify has 10k+, does that matter long-term?

A marketplace count is not a measure of how well an app solves your problem. Shortlist against the exact workflow, permissions, data exports, support, recurring price and compatibility with the proposed plan. Test overlapping apps together, because scripts and competing data updates can create problems. For Magento extensions, also budget for version compatibility and upgrade work. Choose a small set of maintainable dependencies rather than treating the number in the question as a verified current advantage.

Official references: Shopify plan scope; Adobe extension-model differences.