Has PSU tech changed in the last decade?

[silk186]

Temps are pretty poor in my Phanteks Evolv ITX so I ordered a Meshify C which is sitting on the table beside me. This got me thinking about my PSU, a Corsair RM650 which I bought in December 2013. While its resale value is still pretty high I'm wondering if it is worth upgrading to a Corsair RM650x v2 or similar. I just checked and it seems to only have a 5-year warranty. Is it worth upgrading? Has PSU technology changed since 2013?

 

[THUMPer]

Efficiency has improved.

 

[Tsumi]

DC-DC conversion was the last major advancement in PSUs. Subsequent tweaks have primarily been in improving efficiency, especially low power efficiency.