You said it right there in your comment.
Sleep mode, (and other effectively off modes) where it is functionally useless, it can do.
MSP430 can do 140uA/MHz. That is ~7 times the power that this application supplies, and that is not counting any single other chip quiescent current or chip that actively provides useful data. You would have to have a battery anyway or a big cap to provide the needed current for on-states. Or you could run it extremely low frequencies like you said, but those tend to not scale linearly at all with per MHz power ratings. Quiescent currents tend to catch up fast at that scale. I would be extremely doubtful that 150kHz would scale perfectly and wouldn’t have already exponentially decayed to around its lowest possible on-state consumption for the chip. I would definitely have to see tests on that.
The smallest of batteries like the VARTA tiny cells in TWS’s are infinitely more useful and practical and it would take this application months to fill a single cell, discounting all losses.
Ah yes, the classic child-abuser-apologist line that every “christian” brings out when confronted about the abuse of their revered leaders that they absolutely refuse to condemn before they go back to church to give money directly to the abusers every week.
Do you love Jesus or have convinced yourself that you love him because you are so afraid of hell? Very Stockholm syndrome-esque. Take kids during their developmental years and tell them that “people” go to hell and are tortured forever unless they love Jesus and follow sky-daddy’s rules (and by extension, the rules of the church). Then they are told that over and over until they are brought to a special ceremony to declare their love.
Or I guess you have never once been to church and never a single time been told that people go to hell if they don’t love Jesus and accept him into their hearts? I guess you just read the entire bible without any external influence at all and converted after your brain was fully developed after 25 or so, again, with nobody telling you about it. But I guess when you lie, you can just ask Daddy for forgiveness and you get off with no consequences! Tons of harm, no foul.
Either way, I guess I am glad because it is the only thing stopping you from rampaging around murdering, raping people and animals, stealing, torturing, maiming, abusing, and whatever else you apparently so strongly desire to do.