i get it, but i only have so many weekends.. Or we could put on our big boy pants and figure out why fighting an invisible, 2+/3+, re-rolls save, teleporting death star that uses 3 codex's is fine. But taking marine without ATSKNF is apparently the end of the world. Alamo is letting them in, we should open up our hearts and let them in as well.
or that Dark Angels/Space Wolves armies are A-Ok fluff wise, or Dark Eldar w/ Tyranids
but a setting with multiple stories involving time travel and immortal beings and warp travel itself cant have marines from a different era cause its unfluffy