This is a good idea. Interoperability is key to massively increasing value of the entire space through a more powerful network effect.
Metcalfe's law says that the value of a network is proportional to the square of the number of its nodes. With each blockchain project being an island, the value of the entire space could roughly be said to be proportional to b12 + b22 + b32 + ... + bn2 where bn is the size of a project in terms of network participants. Obviously, (b1+b2+b3+...+bn)2 is a MUCH bigger number.
Building bridges between projects and more multi-chain apps is an obvious way to boost the value of the entire space. Multi-chain apps that can seamlessly and automatically plug in chains that have free capacity and fit the purpose is one way to do that.