I'm late to the party here but as others have said, periods referred to as collapses by historians are in some cases as long as 300-500 years or even longer. Its unlikely that there will be a sudden breaking point. However, everything is relative right? I feel the collapse will have been sudden if it happens in my lifetime.

So getting specific here: I consider the pinnacle of socially accepted societal success for the current order -- one might call neoliberal capitalism -- to have been around 1990-1998 (If you want to know why, I can share but just keeping it short here). I think that since then, neoliberal capitalism has experienced a decline and if the system is completely shattered by 2060 (the most likely cause of this would be fallout from climate change) then I would personally consider that a sudden breaking point.

Consider that on that timeline: an American born in 1995 who buys a home with a mortgage when they turn 30 might not reach the end of their mortgage before societal collapse. This is not only possible but highly likely. I use that example because home ownership and mortgages are a foundational aspect of the storytelling that neoliberal capitalism uses to justify its prominence and also an underlying cause of its decline.