It's just that we have been waiting a long time for someone to convince us spider is not homozygous lethal. There have been rumors of a hidden homozygous spider for years so if it's really possible one should eventually be proven by someone willing to share that info. I can see why there isn't a lot of interest in breeding spider X spider at this point so maybe there just haven't been enough possible homozygous spiders made yet. I have a pair of spiders and I would much rather use the female to try to make bumblebees but suppose after years of pointing out the possibility of spider being homozygous lethal I'll have to breed them together when ready and spend years more trying to confirm a homozygous offspring which might not even be possible. If I fail to confirm a homozygous spider I can never be sure if my odds where just bad or they really don't survive.