Who needs MP3 in 2024? Retrocomputing does! So a really lightweight YouTube client capable of running on Windows 95 and/or 486-class machines producing MP3 output would make a really great sense. Can this? For everyone else there are AAC and OPUS.
Non destructive editing is more important with the new formats, because they compress to smaller files and cause greater problems when you unpack and recompress them.
This is why mp3 still is a good format for 2024.