I’m trying to do the same. I tried testing the idea by turning on airplane mode (no cell radio) with WiFi on.

The one thing I miss is Waze. I feel like Waze plus a solid radar and laser detector are indispensable when driving. I still haven’t found a way around that.

Also, some services require a cell number to sign up. VOIP and disposable numbers don’t always work, so at a minimum I might have to keep a prepaid $35/mo flip phone sitting powered down in a drawer until I need it.