Presume that life only exists for a finite amount of time, and let the universe exist for a long time, and the odds of life existing simultaneously go down. Yo

Presume that life only exists for a finite amount of time, and let the universe exist for a long time, and the odds of life existing simultaneously go down. You can probably manipulate the odds by changing both life-time and life-probability to be anything you want. Add restrictions of life being able to interact causally (i.e. they coexist long enough for a light round-trip) and things get even harder. Then consider how long it takes for life to be capable of interstellar communication and things probably get even more tighter. To get even closer to foolproof, presume a correlation between sufficient technology for interstellar communication and sufficient technology for self-caused extinction-events (nuclear, climate or otherwise). So, there is a very big difference between 'did other life ever exist?', 'does other life exist right now?', 'will we ever have any kind of interaction with other life?' and, 'will we ever meaningfully communicate with other life?'