Ironically, it's expired and renew in every point in time. Even Arahants couldn't stand still in provocative environments. "Mindfulness" is weird english word that doesn't translate well into what it actually is. I would describe the state of mind like "nothingness of soul". At the end of the day, as I understand, Buddhism is about observing things from distance (even mind detached from everything, eventually until there is no mind/soul at all), like "it is what it is". Anger, love, stress whatever comes and go. Urhggg oh my .. buddhist, the more I describe the more it becomes inaccurate.
lmao, reminds me of when in response to a lot of people being overworked and unable to work, they decided to offer a free subscription to a mindfulness app.