So we really need to blame the developers of all the (free) libraries we use for not optimising them to the nth degree so our code doesn't become bloated... No

So we really need to blame the developers of all the (free) libraries we use for not optimising them to the nth degree so our code doesn't become bloated... No one's forcing you to use a library. But if you do they come with tradeoffs. OK, things are slow and buggy. But we've got lots more things thanks to all the productivity we've gained from using libraries, etc. That means we collectively solve more problems for more people. Purism is a nice idea, but ultimately probably not worth the effort until things become so bad that they are, and at that point become a differentiator. I mean, I don't care if a web page is twice the size of Windows 95 because my computer is way faster than a 486.