If you store your data under /run (or /var/run) your district will probably put it on a RAM disk. You’ll lose it in a crash, but you won’t be writing to the SD card and provoking it to corrupt in that crash.

If you then adjust your systemd journal to not write very often you have eliminated most of your SD writes.

The remote sensor systems I run lose power from time to time during the year, sometimes once a day. I’d say each time there used to be something like a 0.1% to 1% chance of corruption. Since I’ve moved to /run and a slower journal I haven’t lost an SD card[1]. Thus far it seems I have at least an order of magnitude improvement.

[1] Well, I had a wind turbine tower collapse in an inaccessible location. The raspberry pi is in a lake now, but it can’t have gone far so I don’t call it “lost”. I’ll dive and recover it in the spring. That camera/sensor has spent a couple months underwater before. In fact, I’ve had three systems end up underwater for months and all the SD cards have been fine when recovered.