Like when you send a .7z instead of a .zip or .rar to a friend or a teacher because that’s what your computer has installed and they’re like “Oh No, not one of those, now I have to install 7Zip” even though the same program that opens .rar also opens .7z I feel like people are way more annoyed when they receive a .7z
Actually, no. Yann Collet, the creator of the famous LZ4, created Zstd as a way to bridge the gap between LZ4 and LZMA based compression ratios while finding a Pareto frontier for compression speed and ratio. Yann Collet works at Facebook. Zstd is open source.