( when I say work, I dont mean sitting around "blue printing" it)
Well, its simple....
Ive watched a person purchase a $1500 1911, And put Promags in it because it was "cheaper".
Ive also had people bring them in unable to disassemble one for cleaning. Or in pieces oddly enough.
They do not seem to like being "dry" and will not tolerate it, from what I typically see... Ive had many brought in bone dry with a statement that "Thats how I keep my Glock/Etc"
Its just a case of treating it like what it is: An all steel ( sometimes aluminum... saw a poly frame once) pistol, that has certain proclivities due its status as the last "early" semi still in common use... they are just not Glocks.
Find the good mags it likes and keep them around and well maintained. Learn how to take it apart, and be comfortable doing so. Keep it properly oiled with something that "sticks", ESSPECIALLY if your carrying it IWB.... a little grease on the rails ( I love old-school gunslick, just never use it on aluminum frames if you luck into some... any decent grease works well.) Is a good idea, but not strictly necessary if you have it oiled well.
Learn how to keep an eye out for the little "ticks" they have... a clocking extractor can be irritating, but is typically not hard to fix. Alot of people these days may take it to a "gunsmith" that throws in some other extractor, with no regard to its tension or what not, and then when it still doesnt work, the owner is now soured on it.
BUT, a solid functional 1911 that runs well, as long as you give it good mags, and that receives proper care and the owner learns its quirks, it is a fine handgun.
Its just not as "simple" as a "modern" handgun.