I have had 50 days plus on a few occasions (never managed 100 days).
After a period of a few weeks away from booze my first night was always at about 60-70% of where I left off. Within about four days I would be back to 100%. Then scarily (of late) my tolerance would reach new levels.
As an example - in about 2015 two bottles of wine - maybe a glass more on top - would have seen me flat out in bed. Nowadays I can drink four bottles of wine in an evening with a beer or two on top. Perhaps even a spirit or two as well.
In my experience it just keeps getting worse and worse. My drinking sessions could last for 12 hours. It was miserable and lonely. I'm scared it will get even worse if I go back.