[MechanicalTwerk]

I kind of agree with this. To take an example outside of ETL/DW/BI, when I first saw Zapier I was skeptical of how many APIs they could support because I'd seen a decent amount of open source ESBs like Mulesoft run out of steam after a certain number of connectors. Zapier, being proprietary from day one (albeit less featureful than a full blown enterprise ESB) has done better than I expected. Still, they only support 100 or so datasources and the types of data/objects/triggers/whatever they support is limited at times. IMO at some point both open source and proprietary models fall apart in the face of the long tail. Amazon has tackled the long tail of ecommerce but that's an enormous market that allows them to employ hundreds of thousands of people to tackle that long tail. Tackling the long tail of connectors (whether it's for ESBs/SaaS integration or ETL/DW/BI) is just too expensive compared to the size of the markets that are willing to take a shot at it.