New
#21
https://www.google.com/search?hl=en&...ts=&gws_rd=ssl
Above is a Google search for "64-bit advantages". 150,000 hits. Read as much as you care to.
That's where you will find the "technically compelling" reasons.
I did not "bother to upgrade from 32-bit to 64-bit". I "bothered" to rebuild my PC in order to get more CPU power, an SSD, and more/faster ports on the motherboard. All of which are much more important to me than any of the advantages of 64-bit.
Given, and it is a given, that I was going to rebuild, there was no reason whatsoever to stay with 32-bit, due to the reasons found in the above 150,000 hits.
That's an entirely different question than the one before you. It's your call whether or not the technically compelling reasons (related to architecture and security) are sufficient to cause you to spend the time required to reinstall.
Reinstalling per se is less than an hour job. But that excludes the many hours it takes to re-install and custom configure dozens of applications, back up data, reload data, update Windows, ad vomitum.
If it's worth it to you, you should get on with it and start tonight. Otherwise, no.