"The time of generous grace to WAKE-UP is not limitless."
Then what?
I think the best answers to that question are found in Ezekiel, Daniel and Revelation.
It could be argued that once the Tribulation period begins, the count-down clock begins to tick away inexorably. When the 3.5 year mark is reached and the GREAT TRIBULATION begins with the wholesale WRATH OF GOD, the tortured horrendous rush to Armageddon begins in terrible earnest.
Once Armageddon is concluded, it is logical that the dispensation of Grace will be concluded and the opportunities to repent and join God's team and side will be over.
It is also logical that when things begin to disintegrate into tortured chaos and globalist depopulation efforts wholesale, that INDIVIDUAL opportunities to repent will be diminished, shortened dramatically for hundreds of millions of souls--particularly for approximately half the global population.
God indicates that in the initial traumas--probably after the start of the Tribulation period--that initially 1/3 of the global population will be exterminated. Later on, another 1/3rd of what's left will be killed. IIRC, that mathematically = about half the original population.
As the Bible declares: TODAY IS THE DAY OF SALVATION.
Wayward, arrogant, godless folks would be wise to wake-up, confess, repent, reform their ways . . . now.