Unbelievably, even DDR3 isn't spared. Our suppliers have been quoting us much higher prices for DDR3 for months now, and we're experiencing persistent stock shortages. Fabs are abandoning legacy nodes to prioritize AI capacity, making it rough even for maintaining old gear.
The main downside is shifting from inline validation to out-of-band state syncing. For handshakes to stay small, browsers must constantly cache fresh "landmarks." If a device has been offline and hits a flaky hotel captive portal, it lacks these landmarks and triggers a fallback with massive inline ML-DSA signatures—bloating the handshake to 10KB+ exactly when the network is at its worst. It essentially turns a crypto size problem into a browser background syncing challenge.