Would appreciate feedback on the usefulness of this Gmail extension we are launching. It lets you indicate an email needs a response and automatically sends follow-up messages bumping the original to the top of the inbox if none is received.
Personally, I'll often open an important email on mobile and get interrupted before hitting "save as unread." This solves that issue and the general lack of signal for important emails. That said, we are building a bunch of safeguards to make sure that senders do not overuse this tool or attach it to unimportant messages.