It led to a forum post from 2018, written by a user named mkv_dreamer :
: MKV can store dozens of audio languages and subtitle tracks (SRT, SSA/ASS) within a single file, making it the gold standard for international content. Superior Audio Quality : Unlike MP4, MKV natively supports FLAC (Free Lossless Audio Codec) , allowing for bit-perfect audio preservation. Error Resilience 123mkvcom mkv better