[kelnos]

Where I work, the majority of our tools were built in-house, mainly because we started (2008) before there were good open source or even paid options for most of it all. As good options started to appear, we found that we couldn't adopt them, because there was a mismatch in concepts/fundamentals between what we'd built and what was out there. We've evaluated a lot of things, and for many of them, we end up realizing that integrating them with our systems would require a hard fork, and so we'd lose most of the benefit of using it.

Frankly, it sucks. Our tools are mostly very good, but it took us a long time to get there, and the internal fights over getting funding to really invest in our internal platform have been exhausting for all involved. I get that it's not zero work or zero time to use something off the shelf, but as someone who has been playing in the grass on the other side of that particular fence, it takes a lot of work to keep that grass green.