Re:how about we stop arguing (Score 1)

My bigger concern is Lightning's fate after it hits 1.0. Lightning's predecessor, Sunbird, was killed at 1.0, after seven years of development.

Sunbird really was just a standalone version of Lightning and shared the same backend code. The problem with it is that it lacked all the email and addressbook integration that Lightning provides with Thunderbird. I guess it also was more and more difficult to maintain as Lightning integrated closely with Thunderbird.