Truly. It was so encouraging to me when I was starting out, and has repeatedly been a good reminder.
After all, how much of what we were supposed to learn in school do we use today? What my kids are studying/practicing/learning is what they want, which means it will most likely stick. And yes, my 13 year old may still be baffled by long division, but she knows stuff about history and music that I never will fully understand, and that's fine.