I recently updated my online machine to 0.92.3 and was wondering if there is any need, or there will ever be a need to update the software on my offline computer. I believe I'm running 0.90 on that one.
In the same vein, is there any reason for me to worry that my hard copies wouldn't work in the future? Say I put them in a safe deposit box and then died. Would my kids be able to use the same codes to recover my bitcoins in Armory 16.8.0 in 15 years?
It should always be backwards compatible but you should keep the old installers saved. But it's open source, anyone can make a tool to parse.
Now your offline must be updated I think after .90.1