Adding to this, My late mid 2014 MBP has the kernal_task heavy write issue. I ha...

Adding to this,

My late mid 2014 MBP has the kernal_task heavy write issue. I has written over 15TB the last 61 days. The new nvme disk I installed two months ago is already at 2% wear:

  Available Spare:                    100%
  Available Spare Threshold:          10%
  Percentage Used:                    2%
  Data Units Read:                    45,859,839 [23.4 TB]
  Data Units Written:                 44,541,716 [22.8 TB]
  Host Read Commands:                 296,573,912
  Host Write Commands:                218,840,299
  Controller Busy Time:               6,954
  Power Cycles:                       138
  Power On Hours:                     1,662

A quick Google directed me at:

  - Spotlight indexing packages folders (npm, pip etc). Add those to the "privacy" tab in the spotlight settings to skip indexing.
  - The battery and or logic board may be failing.