I wish I had a single unix command-line tool that presented a single command-line interface but can work with all the various compression formats I use (tgz, 7zip, zip, etc).
Currently zip, 7z, tar, zstd etc all use different tools with totally different interfaces. I find myself needing to consult one or another --help far more than I should. zstd just startled me greatly when I discovered that zstd -d by default writes the output file in the same directory as the input file rather than pwd
