If you're running Debian Stable all you're going to get are security updates anyhow. I make my living on Debian and some Ubuntu and I will tell you confidently the Debian folks are pathological about stability. Thankfully. With that said, when they issue "point" releases (12.1, 12.2) there'll often be bug fixes; but not package version updates: That would not be "stable"!Paying for a Linux OS is crazy. Unless you need support.
My two (wife and mine) 2010 Lenovo laptops with dual core processors wizz along just fine on Debian 12 (Cinnamon).
I used to do the manual update/upgrade manually, when i remembered. With a little time and energy Debian updates itself daily (unattended-upgrades).