Debian is aging well. I moved to Sarge from Redhat in (unknown date, but the Wiki says 2005) when my nerdish friends and I discovered the wonderful utility of APT. After the unusable kludge of RPM, by itself it was enough to make everyone change over.
In all those years in between, I never found any reason to switch to another distro.
I will celebrate the birthday by beginning my move from Bullseye to Bookworm.