P: Saving copy not saving over jpg file

Give credit to Adobe for overly complicating a bug fix without really fixing it. Now we have a "Save as" that changes your currently open file. If you "save as"  layered PSD as a jpg, it will flatten the open file. Even if you go through the extra step of clicking on "save as a copy" within the "save as" dialog box, it automatically puts the dreaded and unwanted (for many of us) " copy" suffix on it. Workaround: click on the file you want to replace in the window and the name will change to the " copy"-less name you desire for a pure replacement. Click OK and ignore the expanded verbiage on the warning. 

I went the extra step to change the keyboard shortcut for "save as" to be "save a copy"

What would be awesome (like Adobe used to be) would be an option to save and replace a jpg in parallel every time you save an original layered PSD or TIFF, especially if it gives you an option to scale the jpg down as it does. This is the kind of thing Adobe used to add in the 90's, when it still seemed liked they cared. Surprise and delight.

"Save as" changes the name of the open document to whatever you saved it as. "Save a copy" should not.

But I don't understand your comment. First you say they changed "Save as" to "Save a copy," but then you say you don't understand why "Save as" is there. So... are they both there? And if so, what makes you say they changed the name?

I can confirm. 22.4 fixes the issue on macOS 10.15.6

They've changed the nomenclature from "Save As..." to "Save a Copy..." (though the Shift+Command+S keyboard shortcut now maps to "Save a Copy...") where you can choose JPEG and PNG etc. (You can also choose Photoshop from the menu, so I don't fully understand why "Save As..." is necessary, but I'm sure it's there for a reason.)

Version 22.4.0 seems that it is finally fixed. But as new obstacle - now it is not enough to select Save As, but you must select another sub-option "Save As Copy" to save JPG or PNG. Oh, my God!

UGH. *facepalm*

Such a disgrace.

It looks like Adobe is not reading these comments

this is a very annoying problem, and worse than that, it disturbs productivity a lot. 

May 2021, Photoshop 22.3.1 and still no fix...

Adobe help told me they're aware of the bug and that the engineering team is working on it... since 2019.

Beware that there is a defect in Apple's Save File dialog; I don't know if it'll affect this workaround.

If you click on a file in a subdirectory to overwrite it, Apple will instead write to the root of the volume you're looking at. I imagine this will still happen if you move the file to the trash. The situation is still better than not moving the old file to the trash, because you won't be able to confuse the two files; your new one simply won't be there when you look for it.

That's the first quick work around I tried and it worked...!! Thanks for this help. It will change my work flow in a positive way.
If Adobe is not gonna help us than this is the way....!