There were a number of utilities that would convert from arc to zip and that really sped up the conversion - and the zip compression made significant differences in the transfer time so it was worth the effort to convert just for that reason. Some BBS software (or doors) would convert uploads from arc, sea, zoo etc to zip on upload. Between the two the move away from arc happened more or less overnight.
One if the failings of zopfli (IMO) is that there isn’t a utility to walk a directory and find embedded deflate streams and decompress them and there isn’t any indication that zopfli has touched a file so it is a brute force search to try and recon press a file. I’m also surprised that deflate with 64k windows never caught on even though zip has supported it for years and it’s a really easy extension to the existing format that just uses a reserved bit.
One if the failings of zopfli (IMO) is that there isn’t a utility to walk a directory and find embedded deflate streams and decompress them and there isn’t any indication that zopfli has touched a file so it is a brute force search to try and recon press a file. I’m also surprised that deflate with 64k windows never caught on even though zip has supported it for years and it’s a really easy extension to the existing format that just uses a reserved bit.