Earlier quoted context omitted.
Every major version over the last 15 years has made some very minor usability improvements and added as many regressions .
I wholeheartedly disagree. The usability improvements have been major for me, and I can't think of any regressions. Again, I think Microsoft has to (and is doing arguably well at) focusing on the lowest common denominator of users.
When you format the number format of the axis of a chart, you now need two steps, adding the new numberformat to a list instead of applying it directly, it serves no purpose.
When you open a spreadsheet programatically it now opens in the background of the current sheet so you have to manually look up for it instead of opening at the front as before.
When you want to save to file it is now a two steps process, where you have to select filesystem as opposed to cloud stuff then you can save. I don't use MSFT's cloud services, this is a regression to me.
When I open a spreadsheet from an email, I now have to click the edit mode at the top to be able to do anything with it.
Microsoft making it increasingly difficult to for someone to install addin or execute macros, you now have to disable many security settings. More pain for my ass, particularly if I need to do this with my colleagues computers.
Lots of small things like that, that balance the many nano-improvements that appeared over 20 years.