I struggle to imagine having a harness that isn't open source. Maybe one that had a really really really strong plugin system?
But: I want to be able to do some adjustments and scripting of my harness! If all the places to forefit your agency and use some closed proprietary system, I cannot imagine compromising on my harness! My gracious. This is the seat of my agency & there's no way I'm going to yield that up, give that over to some closed solution someone else hands me!
(I also do recommend DIY though, find a good base!)
But: I want to be able to do some adjustments and scripting of my harness! If all the places to forefit your agency and use some closed proprietary system, I cannot imagine compromising on my harness! My gracious. This is the seat of my agency & there's no way I'm going to yield that up, give that over to some closed solution someone else hands me!
(I also do recommend DIY though, find a good base!)