@Reiddragon @iska @lispi314 most of them are just re-tunings of LZ. lzma does fine with lots of small files but you get the best packaging with long range dictionaries (ex. "solid" compression where the whole archive is encoded.)

zstd added a feature to make and use your own dictionaries, so you *could* get a kind of blend of solid mode while retaining random access (though the dictionary has to be intact)