Signet is certainly easier to use, but I think it is not so good for modelling open network dynamics -- particularly if you want to model how something works with miners.

bitcoin

bitdevs

Testnet5 BIP Draft

Scoresby

Testnet4 [genesis block](https://mempool.space/testnet4/block/00000000da84f2bafbbc53dee25a72ae507ff4914b867c565be350b0da8bf043) is May 2024.

Signet is certainly easier to use, but I think it is not so good for modelling open network dynamics -- particularly if you want to model how something works with miners.