I don't think that model has gone away. That's largely the basis for how all those large companies (FAANG's included) contribute to open source, and some smalle

I don't think that model has gone away. That's largely the basis for how all those large companies (FAANG's included) contribute to open source, and some smaller companies as well. The model is IMHO fairly well explained by "sharing the maintenance burden of commodified infrastructure" in some cases, and in other cases by "commodify your complement". Open sourcing the core value proposition of your company? Yeah, that's where all those OSS startups are struggling, and then get a lot of flak for shifting to proprietary licensing (e.g. Mongo, Elastic).