After the critique in Japan about the looming obsolescence of the whole stealth concept, the F35 itself is already facing obsolescence issues in some of its core systems.
F-35 project seeks to overcome EW obsolescence - IHS Jane's 360
The United States has embarked on a technology refresh development track for the electronic warfare (EW) module of the F-35 Lightning II Joint Strike Fighter to overcome obsolescence issues before the system has even made it into service.
This has seen the US Naval Air Systems Command place a USD149 million contract to Lockheed Martin, as a modification to a previous advanced acquisition deal and covers the "redesign and qualification of replacement F-35 Lightning II Joint Strike Fighter Electronic Warfare system components due to current diminishing manufacturing sources".
Principal components of the fifth-generation multi-mission F-35's integrated avionics suite are the Northrop Grumman AN/APG-81 Active Electronically Scanned Array (AESA) radar, Northrop Grumman's AN/AAQ-37 Distributed Aperture System (DAS), the Lockheed Martin AAQ-40 Electro-Optical Targeting System (EOTS), a VSI (joint venture between Elbit Systems and Rockwell Collins) Helmet-Mounted Display System (HMDS), and BAE Systems' digital AN/ASQ-239 (Barracuda) system derived from the F-22 Raptor's AN/ALR-94 EW suite.
BTW, this falls outside the original upgrade program meaning this will be an extra cost for the customers, not automatically picked up partially by the suppliers.