When nostr:npub1jg552aulj07skd6e7y2hu0vl5g8nl5jvfw8jhn6jpjk0vjd0waksvl6n8n Green upgraded from nLockTime to CheckSequenceVerify, users didn't care about adopting a new OP_CODE.

They cared about no longer needing to back up pre-signed transactions.

When wallets add support to covenants, most users won't care if it's CTV, CCV, or CAT...