True. It's just my observation that today's approach is mostly "let's focus on our value proposition and outsource everything else" to the degree it becomes det

True. It's just my observation that today's approach is mostly "let's focus on our value proposition and outsource everything else" to the degree it becomes detrimental for the product and company. Surely if you're trying to re-implement PostgreSQL, it's, to put it mildly, interesting (though even here there could be discussions - perhaps you just need a specific slice of functionality?). But for many, many other things, which are at worst a few man-weeks works - and sometimes man-hours, if you're sober with requirements - you could win with the other approach. If you're adding something external, just make sure you're serious about that - documentation, technology background vetting, training, all those things. Otherwise the opinion that "external solution produced by team bigger than ours" is better could be based on an illusion.