This could limit the role it will have in the crypto ecosystem if it can’t integrate with other full-featured coins.
Why no support for smart contracts? Also it doesn't have pay-to-hash or a capability which would enable cross-chain atomic transactions
Nano is designed as a p2p coin to be simple and pure, doing one thing and do it well. Every feature addition would make it exponentially more complicated and difficult to develop. This simplicity is a feature by design, not a flaw. As the project increases in visibility and scope, the addition of features will be investigated. Currently, there is a fairly small development team who are focused on improving the core protocol. They may also be a possibility for second-layer approaches in the future.