Comment by grantcox

My M1 Mac Mini is also at 3% after 2 months, 1 TB disk:

  Percentage Used:                    3%
  Data Units Read:                    168,154,606 [86.0 TB]
  Data Units Written:                 169,999,872 [87.0 TB]
  Host Read Commands:                 1,077,848,202
  Host Write Commands:                743,848,335

this is a secondary dev machine, so while it's been on and idle for almost 500 hours, it's only had a week or two of "active work".