3·
2 days agoIt’s not much of a stupid question even given that - for a refractive medium, speed of light can change with its movement. Though for air it’ll be extremely hard to directly notice; it has n≈1.0003 so speed of light in air is already 0.9997c, and increasing it to, say, 0.9998c would require moving the air at 0.166c.
Thunderbird definitely does have autosync nowadays. No tray icon, true, but it can send native notifications which isn’t much worse.