Not Unecessary.
Operating systems and the word processing apps you speak of are ALL going to 64 bit code architecture in iOS.
Like it or not, kicking and screaming, ranting and raving, 32 bit coded apps are going away In iOS.
Apple changed over to 64 bit coded architectures, firmware and software long ago in OS X.
OS X software has been 64 bit coded for quite sometime.
It just took iOS much longer to play catch up.
Get used to it!
It may not be long before we have 128 bit coded hardware and software.
Technology marches on at an incredible pace.
You either keep up the best you can or you get left behind with computers and devices that will eventually become completely obsolete.
Your maybe able to survive with an older iPad 2, 3 or 4 for another year or so, but without any more 32 bit app updates, eventually older versions of apps will no longer work with their newer 64 bit versions.
Apple made the new 2017 iPad 5 as cheap as they could make and sell it and still make a profit to get users to stop clinging to their old 5-6 year old iDevices!
You can get a 32 GBs storage 9.7 inch screen iPad for barely over $300, now!
A 128 GBs storage 9.7 inch iPad for well under $500, now, too!
Just over 2 years, ago, a 128 GBs iPad used to sell for $799!