You can back up the folders (already installed) and drop them into another Steam install
Yeah, I'm actually using the same Steam install from 3 OS wipes ago (it must automatically reinstall the services when you run Steam.exe the first time), but you still need to log in to steam at least once, vs. gog's standard installer which is fully offline. It's not a big deal most times, but with older games I can see it being handy not having to get networking working on whatever you want to install them on. Though most older games on steam don't actually seem to have been modified to do an authentication check when you run the .exe directly, so it's a bit of a moot point. And you and others point out a lot of good things about sticking with Steam, though one other potential advantage of the DRM-freeness of GOG might turn out to be the ability to make 3rd party downloader/installer clients that meet your demands.
Still, at least you can backup your download and look after it, which is more than can be said for Steam if it were to go down.
Meh, it's easier to just grab it from TPB if my hard-drive crashes, which is the same recovery plan for if Steam ever goes down. Only difference is one is already necessary in case of hard disk crash, the other won't be necessary unless there's a steam bankruptcy followed by a hard disk crash. I imagine it's not technically a legal backup system, but I doubt that it's technically legal to transfer backup copies of the TOCA installer from a mozy backup account, otherwise gog would be providing a backup copy in the first place.
Just to set the record straight here, GOG only pulled TOCA 3 and Colin McRae Rally 2005 because of licensing agreements in those games that were expiring
Yeah, but it makes me doubt gog's commitment to their promise that you can redownload the other games forever, if they didn't bother negotiating for it this time.
In every other instance where GOG have removed a game from their catalog
Yeah, but they haven't removed many other games. It's hard to guess how many more are going to be pulled from being able to be redownloaded. I imagine they say there aren't going to be others, but they also said you would be able to redownload TOCA 3 and CM2005 forever during the final sales on each.
I have no interest in reinstalling 200 games after a format
You'd be surprised at how few games actually need registry entries. I still have games I last installed under Win98