I'm one of those annoying people that keep BT, data and location services off to save power. WiFi I mostly keep on, so in theory you could collect data this way

I'm one of those annoying people that keep BT, data and location services off to save power. WiFi I mostly keep on, so in theory you could collect data this way too. Regarding the ESP32's reliability, it's likely power supply related. I've seen exactly this before. I run ESP32 devices with a 1A 3v3 linear regulator with a little smoothing, and zero issues.