This is true, but if MS had made 64-bit starting with Vista, like they should have done, we wouldn't be in this situation. There is absolutely no reason to have 32-bit at this point. I could forgive MS delaying one generation as Vista completely changed the way hardware was handled and it took manufacturers a while to catch up. MS seen their mistake for not going 64-bit and when they had win7 beta, they required 64-bit for all drivers if they wanted windows certification (WHQL). But still they made 32-bit win7. win8 and win8.1 same thing. Now win10 beta has a 32-bit version? will will it end? Apple already went 64-bit a while ago.
This was going to be my rant as well, but I deleted a few sentences in previous posts.

They are still holding onto 32-bit version for... I have no idea.
However, since Vista was a mess anyway and people are still holding onto XP, I am pretty sure that making a 64-bit only OS (meaning, canning 32-bit compatibility as well) would have been great for Linux and the death blow for MS. It took Adobe until 2011 to make a 64-bit flash player for 64-bit browsers.
Zero reason, what so ever, to have a special 32-bit only OS on consumer level PC's. Period. If businesses want to by it OEM, go ahead (for really old programs), I get that.
The 64-bit OS can support 32-bit applications just fine, so why sell a 32-bit only OS?
Again, I have no idea, other than since they "can", they "will".
MS has a bad reputation of holding onto very, very old compatibility while pushing people to a touch screen phone UI on a desktop system. Seriously!!??!! LOL!
I was hoping that Win8 would kill 32-bit, but they wanted the "same" OS to run on phones and tablets, using a 32-bit CPU... /sigh. Same goes up to Win10 Tech Preview: They want the same OS everywhere and everywhere does not include killing past hardware and "forcing" tech advancements.
Ok, end rant for me, too, and trying to remember that this is a C:SL forum and not a general tech blog.
But, seriously, back at the OP, I would look into going to a 64-bit OS and backing up anything you cannot do without. You will be thankful in the future because Cities: Skylines is a great game.