I would also like to agree that Signet should be a BIP.

Problem: Testnet is unreliable. *Testnet is used often for development of
Bitcoin*.
Proposal: To improve the dev environment for Bitcoin, let's create a new
kind of testnet that is more reliable.

I would also like to hear the logic behind "Testnet is Bitcoin" but "Signet
is not Bitcoin"... both are not 100% compatible with mainnet consensus
processes.

-Jon