Comment by MenhirMike

One of things that really annoys me about Windows is that there doesn't seem to be a way to capture audio from a single application even though the audio mixer can clearly change the volume. But if you want to capture, it's only the final mix output for everything (so you better hope that there's no sudden notification sound from anything). Or you'd have to use a virtual sound card like VB's Cable/Voicemeteer, which requires the application to be able to select a specific soundcard.

Arguably this isn't relevant for audio production, but it does make capturing applications a huge pain. (And if I did miss something and there is a way to e.g., have OBS capture the audio of a specific Window/Application, I'm all ears!)