Apple [..] sometimes doesn't pay until as long as 90 days after it uses a part [...]
I think only "lame". With $80B and 40% margin, company with that reputation...
Manufacturing is hard. And very expensive. Organize processes, buy machines and raw materials, pay the labor. And then comes Apple and gives itself a loan (basically, it's a loan) from a manufacturer.
No, sorry. It's lame.
PS - Just as a perspective: I help part time in a company my father and brother own (retail and manufacturing company). Even thou other businesses in the industry and the country do the same thing as Apple, they don't. I'm disgusted by that practice here...so, why not be disgusted by it when Apple does it?