He finally replied to me via WordPress Slack. Sorry for the panic. The plugin is still alive, he’s fine and he’s still working on it.
I took this over to Reddit in the hope of getting answers:
ACF:Extended – What happened to Konrad?
byu/taenzerme inWordPress
No, unfortunately this guy has vanished completely.
Same here. Did anyone have contact with Konrad in the last weeks?
