In a way it is
explicitly so when it matters.
- When damage reduces you to 0 hit points and there is damage remaining, you die if the remaining damage equals or exceeds your hit point maximum.
- If damage reduces you to 0 hit points and fails to kill you, you fall unconscious (see appendix A). This unconsciousness ends if you regain any hit points.
- The number of both is reset to zero when you regain any hit points or become stable.
any amount of damage that does not equal or exceed your hit point maximum or cause 3 failed death saves before recovering even a single hit point may as well be zero, It should be no surprise that there is so much focus on how much less dangerous that it makes monsters given the absence of other details. Not only do we not have even a single example of the crit powered recharge mechanics we have healing word looking more accessible between races divine spell list
and primal spell lists. I don't believe the announcement video included anything so much as hinting that there would be changes impacting any of the bullet points & survivability even in a possible variant rule change