[bluGill]

A large part of it has been. The standard deduction is high enough now that most people can't take advantage of the deduction based approach. Of course most tax people will tell you to save all receipts, they will happily charge you to look through them and calculate that they are not big enough to matter. If people knew how simple their taxes really were most people wouldn't be willing to pay as much for it.

[RC_ITR]

That ignores the effect of wealth inequality in the US. You may not know a lot of people who itemize, but our elite / political class does at almost a 100% rate.

So long as they want / use it, it will 'trickle down' to others.

https://www.taxpolicycenter.org/briefing-book/what-are-itemi....

[ghaff]

I've itemized the past couple of years for various reasons and I have some other complexities. But, yeah, most people--especially if they don't have a mortgage--are just going to take the standard deduction.