[If you are posting a new bug, please include the following]
Import 4 files;
File > Preferences > Processing > Max processing > 2;
For each files, set it as > Output resolution: UHD/4K; AI model: Proteus; Frame interpolation: enabled; Frame rate: 60 fps; AI model: Chronos; Scene detection: enabled;
Export each files.
You will notice insane ETA like in this screenshot: