My favorite bike is my ~14 year old carbon fiber Felt Z which I built with what was then current Sram Red 10 speed and some nice Reynolds aluminum wheels, CF handlebars, etc. Love that bike and have no desire to "upgrade", unless the basic components crap out and I need to replace them. The frame? No desire for a different CF frame, especially since rim brake versions are hard to come by.

For perspective, I have a couple of years old titanium bike with Sram AXS 12 speed electronic. 10 speed mechanical is just fine from any perspective.

IMHO, there is nothing that a new bike will give you that is actually meaningful. You might consider changing the wheels if they aren't very good.