Overall good thing! except * standard 7z does not support zstandard * 7z file extension does not explain what's inside, so if you hand .7z file with zstd ins

Overall good thing! except * standard 7z does not support zstandard * 7z file extension does not explain what's inside, so if you hand .7z file with zstd inside to someone, that person will blame you for unopenable archive well if only we could rebrand 7z-with-zstd as some new format, e.g. .zstd (no changes required) ...