exponentially is weird

[lvh]

exponentially is currently initial^attempts; it should probably be initial * base ^ attempts with base=2. Also, we should consider having jitter as an option to prevent stampeding herds. jitter can be linear on the result or on the attempts I guess (dunno how bad floats are for expt)

[lvh]

Some background: https://www.awsarchitectureblog.com/2015/03/backoff.html

[lvh]

I just realized that if you previously used exponentially, and you set a base wait of 1s, it'd never change. (This is now fixed.)