>Huh, but if you have an "we made it ourselves" framework, won't that cost still be there too? In many real-life scenarios it's not a matter of learning a 3d p

>Huh, but if you have an "we made it ourselves" framework, won't that cost still be there too? In many real-life scenarios it's not a matter of learning a 3d party library or an in-house product. You often have to learn some in-house product regardless and every 3d party library is an extra. It's not nearly as cut-and-dry as many people make it out to be. There are many, many specific questions that have to be asked when choosing whether to write or buy.