Implications of fana an naar ( ending of hellfire)

I have started to believe that Hellfire is going to end after thousands and thousands of years based on following report. ʿAbd ibn Humayd, who is among the most esteemed scholars of hadith, narrated in his well-known tafsir: He said: Sulaiman ibn Harb narrated to us, Hammad ibn Salamah narrated to us, from Thabit, from al-Hasan al-Basri, who said: ʿUmar said, __**“If the people of the Fire were to remain in the Fire for a period equal to the sand of ʿAlij, there would still be a day when they are brought out.”**__ Source: Al-Radd ʿalā man qāla bifanāʾ al-jannah wa al-nār Ibn Taymiyyah Pg 49-55 My question is what happens to disbeliving jinn and men who exit hellfire. Do they enter lowest levels of jannah as per some opinions or do they enter araf, the place between jannah and jahannum.