Levi's 501 1955 vs modern 501 fit/differences?

I learned to love Levi's in the late 1970s (when even men still wore jeans so tight, you could hardly sit down). In fact, that is the only jeans brand I've been wearing since the 80s.
For decades I preferred the original 501, because of fit and the unique button-flies; I had them in all kinds of variations ... even in white and red (who remembers the John Kilzer song?)
But styles and fashion change, just like my feel of comfort. Now I prefer the style-numbers 505, 550 and 559, which are more relaxed in seat and thigh. The only thing I miss are those button-flies.
Although Levi's has often tried something new (ie. twisted seams) or lately even retro (ie. 1937 - 501s), they never actually offered the button-fly versions for other style-numbers other than the 501. Why not? I am certain there are many button-fly fans like me.

 

If you buy a pair of Levis 501s fresh from the factory today, are you getting the same fit in general terms as the 40s-50s versions, including rise?

 

The modern 501 has a more tapered leg though not as tapered as 1966 model.
1955 501 description
https://www.levi.com/US/en_US/clothing/men/jeans/1955-501-jeans/p/501550041
The 1944 and 55 have wider leg room (55 has more room in the bum), 47 and 66 are slimmer (66 has a more tapered leg). LVC 1978 501 is closer to the modern fit.
Also if buying pre-shrunk, the shrinkage of all different models in my experience differs.
The 501CT is a slimmer cut of the modern 501. CT's cut is meant to be a middle between 501 and 511.
I just bought two more pairs of pre-shrunk 1955 501 on sale from the Levi's store as they are clearing out the last batch of Made in USA LVC in stock. Now that the last Cone Mills in US has shut down, I think LVC is shifting production to Turkey as they have done so to the pre-washed distressed LVC a number of years ago.