https://www.karelia.com/blog/the-long-story-behind-karel.htm...

> An hour later, Steve Jobs called me.

> "Here's how I see it," Jobs said — I'm loosely paraphrasing.

> "You know those handcars, the little machines that people stand on and pump to move along on the train tracks? That's Karelia. Apple is the steam train that owns the tracks."

> So basically the message was: get out of the way, kid; this is our market.

Hope folks will always keep that in mind as they develop software for proprietary platforms they don't own.

https://www.paulgraham.com/road.html

> If you want to write desktop software now you do it on Microsoft's terms, calling their APIs and working around their buggy OS.

> And if you manage to write something that takes off, you may find that you were merely doing market research for Microsoft.