Incredibly rare X maybe a trillion planets(oids) in our galaxy X maybe a trillion galaxies in whole universe may change the outcome a bit.
Of course if speed of light is the hard unavoidable limit it doesnt matter now or for next few trillions of years. Eventually though, if it will keep expanding, the only important thing in universe will be energy. Species that will grok that first may decide to not share and take it all for themselves. Although sustainability of some empire over 10^10^10^10 years and further... its something even my otherwide vivid imagination can't concieve.
Of course if speed of light is the hard unavoidable limit it doesnt matter now or for next few trillions of years. Eventually though, if it will keep expanding, the only important thing in universe will be energy. Species that will grok that first may decide to not share and take it all for themselves. Although sustainability of some empire over 10^10^10^10 years and further... its something even my otherwide vivid imagination can't concieve.