"Stop on Reply" for emails.
I have my drip set up to text and email a new lead when they register. If the lead responds to the text, the drip stops, the system alerts me that the lead has texted me, and I continue the conversation from there. However, if they don't respond to the text, but respond to the email, the system doesn't stop the drip and it continues to text/email them as if they have never responded. The "stop on reply" feature needs to be added to all forms of communication, not just texting.