SD card lifespan

Wasn’t sure what category this falls under. Running console debian on a SBC off of a micro SD card. There is very little writing (few megabytes a day) to the card and running 24/7. I know life of it varies on usage and answers on the net make vague estimates from 2-10 years. Can anyone give me a more accurate prediction? My usage as described is very little.

It depends on the quality of the SD card and how much data is written to the card on a daily basis. I’m pretty sue the system writes more to the card then a few megabytes a day. I myself have a SBC running on raspberrypi OS and it writes 100-150 MB daily on average. It’s a headless system I only use for pihole and pivpn

[I] [pi@raspberrypi ~ ]$ iostat -p -m && uptime
Linux 5.10.17-v7l+ (raspberrypi) 	06/03/2021 	_armv7l_	(4 CPU)

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           0.04    0.00    0.38    0.00    0.00   99.57

Device             tps    MB_read/s    MB_wrtn/s    MB_read    MB_wrtn
sda               0.14         0.00         0.00        190        220
sda1              0.00         0.00         0.00         23          0
sda2              0.14         0.00         0.00        166        220
 15:50:19 up 2 days, 17:11,  2 users,  load average: 0.19, 0.18, 0.18