.zip is used as a seekable container with some compression. There is no replacement comparable in simplicity. 7z is overcomplicated, compressed tar is not seekable.
.gz/deflate is used when something very cheap and very fast is needed. xz/lzma is quite often too slow or requires too much memory even on decompression.
.gz/deflate is used when something very cheap and very fast is needed. xz/lzma is quite often too slow or requires too much memory even on decompression.
so no, .zip and .gz are very much needed in 2026.