In training classes I have had, it is advised not to use the slide lock mechanism to release the slide, as the metal part eventually does wear, resulting in the slide not locking back.
Yes, I’ve heard it as well several times, and probably it is true for some sophisticated firearms. But less expensive, well made 1911 can handle everything.
My RIA 1911 has been tortured over and over by me, so far I do not see any worn out places .
Once I can afford one of these: DWX, EDC x9, SAS II Utralight, TRS Commander… I won’t slam the slide on empty chamber for sure