Dandere2x is on a new architecture, which is untested but seems to be stable.
There's also a new "multiprocessing" feature that's available for testing, which will create 3 different dandere2x instances for one video, dividing and conquering the video up.
Functionality is limited as I re-add customization.
Reddit Thread:
https://www.reddit.com/r/Dandere2x/comments/k0g0xx/dandere2x_multiprocessing_test_build_030b/