[Question] To what extent is your AGI timeline bimodal or otherwise “bumpy”?

For example, you might think:

It’s likely that AGI will be invented before 2050; however, if it isn’t, then that must mean either that AGI is impossible, or that it requires much more advanced technology than I currently think it does, or else that there was some kind of large-scale civilizational collapse in the meantime.

For that matter, any non-exponential distribution has this property, where the non-occurrence of the event by a certain time will change your expectation of it going forward. I’m curious if people think this is the case for AGI, and if so, why. (Also curious if this question has been asked before.)