I've retired both my War time mfg P38's from shooting. Just too much risk in a slide cracking for me. ,,and that comes from me who regularly shoots a bunch (around a dozen) different Lugers of all different eras with no thoughts of breaking anything.
I've seen the cracked slide P38's in hand.
The correct mfg & era parts are much more easy to find for the Lugers than for a P38, though none are inexpensive.
A slide being a ser#'d part if replaced really brings a nice collectible down to a simple shooter grade gun too,,and again not inexpensively.
I do have P1's that I do shoot. They are earlier non-reinforced frame and 'thin slide' pistols & are still in one piece dispite warnings from others that they'd fall apart.
I realize the shortcomings of the design and their history, the updated 'fixes' and all that.
I really like the P38/P1. It's just a comfortable, accurate pistol for me to shoot and one of just a few semiautos I can still manipulate OK.
I don't expect it to carry on thru 100's of 1000's of rounds. Just be a range toy and have some fun with it. I do carry it as a SD gun now and again and am perfectly comfortable with it,, and for these expectations the P1 fills the need.
The 40's mfg'r P38's get to rest.
I'll pile on and say that The Walther Forum is a great place to learn about the different variations, mfg'rs, wartime, postwar era mfg and all the minutia inbetw.
Have fun!