On fragmentation, I find Raemon’s comment fairly convincing:
2) Maybe it’ll split the comments? Sure, but the comments there are already huge and unwieldy (possibly more-than-dunbar’s number worth of commenters) so I’m actually fine with that. Discussion over there is already pretty split up among comment threads in a hard to follow fashion.
One possibility to avoid fragmenting the conversation would be to wait to link to link to a post at SSC until the comments have died down over there.
On fragmentation, I find Raemon’s comment fairly convincing: