Why release a Tunderbird update before xul-ext-lightning is compatible?
On several occasions, Thunderbird has been upgraded before xul-ext-lightning is compatible. I suspect a large majority of Thunderbird users rely on a functioning Lightning.
It only seems to happen during Alpha testing, but even so we testers still need to know what's upcoming during the day. If it were only for a few hours or a day, I could live with it, but when I don't have a scheduler I quickly reboot into my stable partition, which means I'm not testing.
Evolution just doesn't meet my needs, so that's not an option.