One slight irritation on GoDaddy -> Namecheap. One of these sites has a bug where it's either incorrectly generating ACs with embedded double quotes, like ABC"345"DE, or it's not storing them correctly. I did the bulk transfer yesterday, and this morning discovered that all such domains failed with a bad AC. I'm working with Namecheap support now to resolve it.
So it's still a constant-time operation, but the value of C is growing for me.
So it's still a constant-time operation, but the value of C is growing for me.