It has a Pentium class processor which is 32-bit only. Both Windows and Microsoft software are available in 32-bit in most cases and cannot run the 64-bit flavor. For performance, you would see no difference anyway. Windows has a memory manager which uses the extra RAM that is in the machine for 32-bit applications.
I do not have the Go model myself but do have a Lenovo Ideapad laptop with the same processor and is actually a good machine for basic, low end application use. Not a gaming machine by any standard but runs everything else.
The Go was designed to be a replacement for the Surface 3 which in turn was designed to replace the RT models that came out originally. All are designed for basic, low end - long battery life use.
You should have little or not problem with it except if you have an application that requires 64-bit only, it can't run it. Microsoft Office (Office 365) is 32-bit by default and have to manually select the 64-bit version if you download it from Office.com.
Microsoft plans to keep 32-bit functionality (at least for a while) and will not abandon it like what the Linux community is doing with most distributions. Reason being is GAMES!!!!! A lot of money in games.