nRF7002 + nRF52840 without Zephyr

I'm hitting a wall with implementing nRF7002 + nRF52840 without Zephyr.

I've worked with nRF52's for about 8 years now and on about 30+ products, all using the original SDK. For this specific project, BLE is up and running on original SDK (non-Zephyr) and its time to add WiFi. I'm struggling to swallow that Zephyr is the only viable path for a basic BLE application that is already working in order to use WiFi on nRF7002.

Please tell me there is hope and a future without Zephyr. I won't go into details of why I despise Zephyr and other RTOS's, but in the short of it ... they are not a viable option for the true real-time types of projects I'm involved in.

But seriously, how can I make nRF7002 + nRF52840 work together using the original SDK? Btw, the custom PCB has the QSPI + COEX lines connected as recommended.

Thanks!

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