My goal every day is to end the (work)day with an empty inbox. I reply to or act on messages that I can, and I snooze messages I can’t yet handle to a later date when I expect to be able to.
An empty inbox then means I’ve handled everything I could and will be reminded of everything I couldn’t yet.
I think the issue with mailmindr is that it works completely independently from the web and phone app snooze functions. Messages “snoozed” with mailmindr would not be resurfaced when not using Thunderbird which sadly makes it a no go for me. I don’t think there is really a solution to that at this time.