It might be like that, but we only have one example to look at, us. So it seems to me assuming anything about how long species/civilizations might last to communicate with each other is going to be based off that example of one.
For instance, if a hypothetical species has 100,000 year lifespans as opposed to 100 years, it probably becomes more feasible. Likewise if the drive to explore is super rare among hypothetical species, it doesn’t matter how long their civilizations last, they just won’t look or explore in the first place.
Freegards
I’d bet that if a species had a 100,000 year lifespan, they wouldn’t be real big risk-takers. Would you be doing stuff that can kill you at age 25 or 2500, if you’ve got nearly 100,000 more years of life left? I’m not seeing that as being realistic.
I think civilizations are like individual organisms. They have a finite lifespan. But it’s just my opinion.