I currently use kernel 5.15.78-1. The other kernels have been sitting there in my system settings tempting me. I like the idea of a newer kernel, but I don’t know if it would actually be useful to me.
I run a somewhat old thinkpad, and don’t play any games. Besides konsole, the only two programs I ever use are Firefox and Vim. My laptop is basically just a type writer that can google things. Do I have a reason to upgrade my kernel, or am I just inviting new problems for no reason?
I’m gonna be honest and say that I don’t really know what a kernel is or why its important.
Kernel is the first program that runs, executed by bootloader (jumps to the entry point, technically). Kernel is responsible for making your braindead hardware to live. It hosts most drivers for hardware, handles memory management, executes the init system, etc.
New kernels could mean:
New hardware drivers, as well as deprecated/obsolete ones
New architecture support, as well as deprecated/obsolete ones
New security mitigation that must be handled by software
and many more.
Read the wikipedia article posted by @Mirdarthos above.