> the retry interval should be at least 30 minutes, while the give-up time needs to be at least 4–5 days

RFCs have very little to do anymore with the realities of email delivery. And advocating for password reset emails to only be retried after 30 minutes (all while the user is manically mashing the 'resend link' button) and/or to be kept around for 5 days (while the link contained therein expires after an hour) doesn't either.