After installing them, you wish you had not, since their deletion does not fully restore your system. The problem is that install routines often overwrite current drivers with older, obsolete versions. Reinstallation of your key software may be required in order to recover your initial capabilities. DC2000 tape manufacturers count on this when they sell you drives and cartridges for backup. Diskettes are the most economical choice for demos and small applications, especially when distribution quantities are limited.
Floppies are also great for upgrades and patches.
Even if you eventually log on, watch the byte count slowly crawl along a few KB at a time during download. The fun begins when you find that the file has mysteriously been corrupted and you must start all over again. Please, just mail the floppy to me. It is very likely that a diskette was the medium of choice. If you think of each new product just as a replacement for some existing one, then you have misunderstood storage technology.