Agreed. I'm pretty happy with that.
I was just thinking of the dilithium mines of Remus.
One might conclude that the region of space the Romulans settled is generally dilithium-poor. We saw that proto-Vulcans seemed to hop from planet to planet in TNG, so perhaps during the Great Schlepp, the exiles did indeed travel until they found a world which had then-rich dilithium supplies (Remus)... but otherwise, they live in a relatively dilithium-poor region. And perhaps also they were keenly aware of the need to conserve their dilithium as long as possible, hence the exploration of alternate methods.