Hopefully they’ll build in support for disroot, fastmail, posteo, protonmail, tutanota, and other opensource encrypted mail agends that don’t provide a bridge.
Edit: so the summary of the video is “marketing”. Linux, KDE, and opensource projects in general need way better marketing. If Linux could rebrand itself as anything but “the geek thing”, I bet it would be much more successful.
THUNDERBIRD: the SUCCESS STORY of LINUX! - 6.4M in Donations (www.youtube.com)
A very interesting video about the Thunderbird Project successful donation process and how KDE can improve them by following their step.