I work in the .NET space and was very active for many years on some niche topics (my account is now 16 years old). I still support some older .NET applications

I work in the .NET space and was very active for many years on some niche topics (my account is now 16 years old). I still support some older .NET applications, and I’ve had the situation several times where I’ve ended up on SO via a Google search and started to read the answer, only to feel as if the writing style is familiar. Then noted that I myself answered it and I’m reading my own text for the solution. I’m always amused that a) I keep having the solve the same things over and over again, and b) I can’t remember the solutions. Maybe I’m just old.