On Tue, May 12, 2020 at 01:53 PM, Chris Hill wrote:

I don't know if getting rid of older restore points is deliberate

System Protection Restore Points are purged upon every feature update, and I believe all cumulative updates as well (though it may only be some) under Windows 10.

Your approach to System Protection and its use is the most valid one.  It is not a robust system.
 
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Brian - Windows 10 Pro, 64-Bit, Version 1909, Build 18363  

The purpose of education is not to validate ignorance but to overcome it.
       ~ Lawrence Krauss