My node runs on a laptop that is 14 years old.

You don't need modern hardware to validate and broadcast transactions. 

 Hard disk storage? 

 I upgraded the storage and ram. I have more than enough storage to run a full node, the OS and more. 

 Upgraded to ssd?
How much ram?
And the CPU is keeping up?  

 Same, using an external SSD to store the block data.