The PC, with the successor of the 8085 inside running the successor of CP/M (in the form of PC-DOS) was a me-too of the S-100 CP/M desktop computer, not the Apple II.
The reference for the PC team at IBM was the Apple II running CP/M on a Microsoft SoftCard Z80 board as this was the most popular small business computer in early 1980. It is likely that this was an influence on the PC's expansion cards that look like larger Apple II cards more than like S-100 cards. It certainly was the reason why they thought they could license CP/M from Bill Gates.
CP/M from Gary Kildall.
The Bill Gates we needed.
> The reference for the PC team at IBM was the Apple II running CP/M on a Microsoft SoftCard Z80