I still remember buying Minecraft in 2009, and the original site really hasn't changed all that much. But Mojang (and thus, Microsoft) has really been making strides since the acquisition, finally releasing the game on Wii U, and it's forging ahead with the Windows 10 edition of the game.
The newest step in the plan is to overhaul its site, which is now in beta format. Once everything is done you'll be able to do everything you can on the old portal, like alter your account settings and access your PC copies. It's crazy how well kept the old site was, though -- I was surprised to log in over half a decade later to still find my account intact!