I think GG said it pretty much as well as it can be said.
I can't speak for everyone but I also look at it from the perspective of what I'm gaining from upgrading taking into consideration what I'm also losing in the process.
None of Lion's showcased features like Inverse Scrolling, Mission Control, Launchpad, Safari 5.1.x, Mail/iCal/Address Book, iCloud, Fullscreen Apps have proven to me that I'll get more done or simply make my Mac experience better. In fact most of what I've tested has shown to make me less productive and more frustrated.
Security, Lion is supposed to have improvements in that area but we've seen some really big exploits show up regarding serious LDAP issues accepting any passwords to users with simple local access (not necessarily physical access) gaining access to root admin passwords being able to extract and decode the hash and/or change the password.
Battery time, is Lion better than SL? In almost every situation where I was able to do a SL to Lion test, battery time was between 1-1.5 hours less with Lion. This is critical for me since the only reason why I bought a MBP is not because I feel it's better than a PC, it's because of the battery time.
Lion may be the more advanced/newer OS over SL, but with all the gimmicks and bugs, SL is still the more refined and well-tuned OS.