preservation efforts that allow me to run the games I know on the hardware I am running will mean more to me.

You mean software, your hardware is perfectly capable of running Linux+Wine. But again, this is a very personal response, my personal computer is Linux, therefore what GOG is doing means less to me by your own definition, which is why I don't think it makes any sense to try to bring platform into the table. In fact, since apparently they're responsible for the DOSBox version that a game uses, and there is a native version of DOSBox for Linux, this means that the decision of the game not being available on Linux is entirely on GOG.

Imagine Valve was financing an emulator, and GOG was compromising themselves to keep a binary updated with the latest version of that emulator whenever problems appeared on the old version, which of them is doing more for the preservation of games? The only difference is that the "emulator" Valve is financing is not the same as the one that GOG is using.

I'm not saying that there isn't value in what GOG is doing just because it doesn't affect me, but as is they can only help preserve DOS era games, so investing in DOSBox and hosting the ROMs would be a much more valuable approach (half of it they're already doing, they do in fact host the ROMs, you just get 50 extra copies of DOSBox in the process). What I'm saying is that I don't understand why everyone thinks they're so great for doing what they're doing, they could be investing in getting wine to run on windows which would be a much better effort for the preservation of games for your platform.