I didn't write about it 😱. But one year ago, I released an application to replace the (dead) AllToMP3 website.
It's available at alltomp3.org for Windows, macOS and Linux, and allows to download from YouTube, SoundCloud, Spotify and Deezer. It has been downloaded more than 350k times 🎉.
And it's open-source: https://github.com/allToMP3/alltomp3-app. Give it a try!