This NIP is not yet in main.
Here is an overview of PRs referencing this NIP.
NIP-101 : Event Compression and Encoding Support OPEN @b35363
NIP-101: Mailing lists OPEN @KaffinPX
NIP-101 HTTP REST API CLOSED @jacany
add nip101 - Alias exchange OPEN @water783
NIP-101 Algorithm Transition for Signatures and Encryption OPEN @eznix86
NIP-101 Fix for stolen secret key problem OPEN @etemiz
NIP-79 : `window.nostr` Offline Message Signature & Verification CLOSED @b35363
Adaptive Proof of Work CLOSED @etemiz