AIBU to think this is absolutely astonishing?
I found out because we were doing a new budget spreadsheet and he read out what we spend on different things each month while I recorded each item in Excel. He then asked me to read the amounts back to him so he could add them up. I was like WHAT??? I'll just add a formula in Excel. He said "really, you can do that?" I asked him what he thought Excel was for, and he said he didn't know as no one had taught him.
Have you ever found out someone was doing something in a completely bizarre and illogical way on a similar level as this? DH is in his 50s and is a quite intelligent person (or so I thought). He has used Excel in his job although obviously not extensively. AIBU to be completely shocked?