Apple was founded in the 70’s, yet went almost nowhere as a company for decades- they offered really low rates to schools, and survived mainly on selling systems to schools and other public institutions, while PC’s- primarily windows-based machines- thrived and took over the majority of the market share.
This was due to Apple’s refusal to release the source code to the aftermarket- they are the ultimate control freaks. You won’t find hackers running Apple hardware very often, if ever.
IBM clones are like hotrods- users can modify them, speed them up, (overclock), change hardware components, modify the registry, change OS’s, etc. Apple is tight fisted and paranoid about anyone other than Apple even opening an Apple machine, much less modifying the software or writing programs to interface with their software.
The majority of users who like to modify/upgrade/write programs, tend to be Android users, because of these facts. Apple products tend to be purchased by people who are more concerned with what color their computer or phone is, than how much RAM it has or whether you can gain root access. These are typically also not the people developing new apps.
Apple products aren’t bad- there are a few advantages to Apple’s attitudes- most notably, the system was not quite as at risk from spammers and viruses, although this is changing rapidly now.
Personally, I don’t care for Apple’s bloated prices or their “You’ll take what we give you and like it!” attitude, but, to each his own!