Switch last remaining audio track's "Enabled Flag" to "Yes" when importing a source
I'm using the feature "Only enable copying of tracks with specific languages by default" This helps me a lot to de-russify an MKV.
Often this leaves me with the audio tracks that I want, but because the source file had the "Enabled Flag" to "Yes" for the unwanted audio, I now end up without any audio-tracks with an "Enabled Flag" to "Yes".
It would be nice if mkvtoolnix in that case would turn the first audio-track to "yes"
I do not know if there are any players that will not play audio in such a case. I therefore just ignore it and leave all audio-tracks to "No" as it's much faster. When I need to do 80 episodes I just press "Start Multiplexing".
However, the remuxed file is then a bit less elegant.