Should I replace a 9 year old PSU?

[bfar]

I have a Corsair AX860 in a new RTX 4080 / 7800X3D build. It's old but good and running fine, but I didn't realise it's over nine years old until I came accross the receipts the other day. Would I be wise to replace it? It could go in my NAS (which has an even older PSU ).
if I needed recommendations I'd probably shop in the 1000-1200w ATX 3.0 category.

 

[bfar]

Long story short, I actually changed it out. I originally thought it was one of the system fans, but the old AX860 was actually emmiting some fan rattle or coil whine at idle. Otherwise I'd have followed the good advice given. I'll risk it on my old low power NAS, but not on my brand new 2k rig.
Bought a Corsair Shift RM1000x for 200 squids. Not the efficiency champion in its bracket, but still very much top tier, and one of the few ATX 3.0 1000w+ that doesn't operate an aggressive fan curve. It's a quiet, tidy PSU and should last a few builds. I'm happy with it.

Thanks for the advice.