Lines under 1pt render thick in PDF
In Illustrator, lines thinner than 1pt end up rendering a mess (thick, out of alignment) when viewed in PDF. This is fixed in the viewer by un-checking "Enhance Thin Lines", but it is unreasonable to ask every client of a designer to update that setting. Furthermore it's impossible to un-check this setting, for example on the Vistaprint website where the PDF preview of an AI file is used as the product proof.
Please fix this. There have been a million excuses on why this is not a bug but a feature, but we NEED the ability to disable it from the document.

Hi,
Apologies for the inconvenience caused to you due to this issue and getting back to you this late.
We are unable to reproduce this issue in house.
Can you help the Illustrator team to isolate this issue further so that we can nail this down?
If yes, then please let me know the following:
1) Is this Issue still happening on your machine in the Latest version 23.0.3 ?
2) If yes,Kindly provide Test file(Via File→Package) with which you are facing issue and share with us at ShareWithAI@adobe.com in a Zip file.
Please mention the title of this issue as the subject of the mail.