I want to disable Excel 365 performance improvement auto-nags

Let's skip back to How to stop Excel from automatically checking Workbook performance? - Microsoft Community

This is about repetitive screen clutter, it doesn't need to be there so let's switch it off. I'll point out that contract worker such as myself have no scope to change the settings of the working models of companies we work at. So on a daily basis we have to clean away screen trash which is electronically generated by a Microsoft product. Screen space is always at a premium.

Now the answers on the above link completely skip around the issue - if anything they misunderstand what the questioner is driving at. As another person irritated by intrusive - let's call it feature creep (harsher words could be used) - I'm bemused that increasing product complexity isn't accompanied by ways to clean things up by eg turning off nags.

The issue hasn't gone away. It isn't solved. And yes - just to be clear - I'm perfectly able to redesign spreadsheets to make them more efficient and limit bloat - and I do this if it's in my remit.

I'm also aware that answers can be phrased to close down issues that aren't going to be fixed.