Why MP3 is still everywhere
MP3 survives because it works almost everywhere. Phones, browsers, cars, smart speakers, editing tools, and older devices all understand it. For users who need a quick and portable audio file, that compatibility still matters.
Where newer formats are better
Modern formats can sound better at smaller file sizes, especially when the source is high quality. Streaming services also use newer codecs that are optimized for bandwidth. MP3 is not the most advanced option, but it is one of the most predictable.
What this means for YouTube to MP3 users
If your goal is simple offline listening for content you are allowed to use, MP3 remains practical. If your goal is archival quality, editing masters, or professional production, use the original source files whenever possible.
Quality still depends on the source
No MP3 setting can create detail that the source does not contain. A high-bitrate MP3 can preserve more available data, but it is not a magic upgrade.
Responsible use
Use converter workflows only for content you own, created yourself, have permission to use, or that is licensed for your intended use.