One of the most upvoted feature requests is adding back .mkv support. It has been a mess for the community since Adobe randomly decided to remove it for no reason. After several years, Adobe announced they would add it back and it's in beta (2024), well, I just updated to the lastest version of 2025 and Premiere Pro as well as Media Encoder cannot import the file type, which is a huge pain still. Work around have caused audio pops due to remuxxing, corrupt files due to segmented .mp4 files, lost files due to non-segmented .mp4 files, and a ton of time converting it with third party programs.
DaVinci Resolve can import .mkv files natively. It's embarrassing that Adobe can't even convert .mkv files with their MEDIA ENCODER program.
With the cost of Adobe, it's a joke that us users have to bend over backwards trying to workaround a file type that used to work in Premiere and Media Encoder for a DECADE.
When will .mkv be put back in?