I'm affraid I don't agree with you. I've bought dozens (and I really do
mean a lot) of softwares by means of download (plugins, full softwares,
upgrades, etc.) for many years now and I have never, ever run into any
problems specific to download versions. The latest being Photoshop Album
and it has run flawlessly. Later, I downloaded the upgrade and still,
everything is fine. Same goes for Norton Anti-virus, Auto Fx Dreamsuite
Gel, Virtual Painter from Jasc, Pocket Quicken for my Palm, TinyDB for the
Palm again, Cyberlink PowerDVD, etc. The list could go on... ;)
To be on the safe side, though, I do burn everything on CDs. I never know
when my system will need a fresh reinstall or when the hardrive will fail.
Also, at the root of the CD-R, I will put a text version of the mail
containing the activating key as well.