what if positive feedback loops are on short timescales (1k years) and negative feedback loops are on geologic timescales (1 million years)? then for current human purposes the negative feedback loops may as well not exist.
I think this is unlikely because in this scenario we would see a geologic record of many gap up instant warmings and then a slow decline, which afaik is not the case.
What about the perturbation of the typical cycles by dumping lots of climate warming gasses into the atmosphere?
If nothing serious is done (as we are doing at present) and the warming becomes a runaway, it will progress until the causes have dissipated (e.g. we are no longer pumping GHG into the atmosphere and the natural sources of these have been exhausted or at least come into some kind of equilibrium.)
I'm too old to be able to witness that but I think our race as a whole is likely to do so.