Have Xenon boards lying around do nothing?
Why not WiFi 6 enable them with USD$10 low power nRF7002-EB from Nordic Semi?
The nRF7002-EB (https://www.nordicsemi.com/Products/Development-hardware/nRF7002-Expansion-Board) is a neat little castellated expansion board with WiFi 6 2.4GHz / 5GHz support that can easily be turned into a FeatherWing HAT. The Nordic Semi's board provides advanced security, seamless coexistence with Bluetooth LE, and more.
Xenons can be reflashed to make excellent Zephyr RTOS dev boards. With the WiFi 6 nRF7002 dual-band, these boards can provide even greater applications where low power is important.
Huge opportunities await with Nordic Semi bringing out a host of new SoC and SIP series
- nRF54L15 ultra low power replacement of nRF52840
- nRF54H20 fast multi-core/multi-protocol
- Low power SIP for LTE/NB-IoT modem with GNSS and DECT NR+ (nRF9161 and mini SIP nRF9131)
- nRF7002 low power WiFi 6 with Bluetooth LE
- nPM1300 PMIC with fuel gauge
It'll be interesting to see if Particle adopts any of these SoC or SIP in the next few years, esp. the mini nRF9131.