As long as you never got into the cheating of numerical approximation, you’re fine....
Undergraduate and graduate numerical methods. There are a lot of diff-e-qs that don’t have definite solutions, the only way to get to a solution is via numerical approximations. Fortunately PCs came out right as I was graduating undergrad, so I was able to do my graduate numerical methods in interpreted BASIC on an IBM-PC in my apartment, instead of going down to the computer center to use the terminals into the mainframe. Many of the solutions would take hours to converge to a solution on my PC, but that was OK, I just let it run overnight.
So I was PC when PC was still cool!