I'm not disputing that newer OS's run slower on older devices.
I'm disputing that this is done intentionally to degrade performance and make it more attractive to upgrade - which is what the original comment stated.
They actually disable most of the new effects on older hardware which indicates that they want the software to perform acceptably.
And more to the point, supporting older hardware at all extends the useful life of that hardware by allowing it to run modern applications and have access to new features.
I'm disputing that this is done intentionally to degrade performance and make it more attractive to upgrade - which is what the original comment stated.
They actually disable most of the new effects on older hardware which indicates that they want the software to perform acceptably.
And more to the point, supporting older hardware at all extends the useful life of that hardware by allowing it to run modern applications and have access to new features.