[dastx]

This is probably similar as self-hosting some services vs letting someone else deal with it. Hosting something like Elasticsearch requires a lot of knowledge and understanding. If you run it yourself it's free! So you end up doing it yourself, but really you'll need to spend engineering hours on it. Engineers being one of the most expensive expense in a business, you've suddenly not really saved much, and you'd have been better off having Elastic do it for you, and you could have started using it in less than a week rather than months.