How do SPV wallets find peers?

If you’ve ever used a multi-chain SPV (Simplified Payment Verification) wallet like DCRDEX, a few questions might pop to mind when comparing Decred against Bitcoin, Bitcoin Cash and Litecoin. Firstly, how does Decred’s SPV mode synchronise, so quickly when compared to the others? And secondly, why does Decred seem to have more available nodes to synchronise to?

Let’s focus on the second point, “why does Decred have more available nodes to synchronise to?”. In many ways, this seems like an odd scenario, especially when you compare the number of full nodes running those networks. So why do these platforms encounter issues when trying to find full nodes to serve SPV wallets?

cypherpunktimes.com