That's true in any field though. Yet people are still able build their own cars, planes, design/fabricate their own chips and so on. I think its primarily becau

That's true in any field though. Yet people are still able build their own cars, planes, design/fabricate their own chips and so on. I think its primarily because our tooling has also advanced allowing you to do stuff in your garage that previously could only be done at some factory. To take your example, all of those things are not really that hard. Mainly because a lot of those things are established standards (using the word loosely here, as with anything to do with the W3C) with existing implementations whose source is available. Its up to you to decide how much of the standard you would have to implement for a MVP.