Yea - I get that argument but these days it's just hard to do infra as true FOSS with the hyperscalers and current cloud economics. There is a community license and and the code is visible. Not saying it's ideal but Redpanda is further into the open source world than WarpStream.
Not really? I'm not a stickler on the term "open source" but they're both proprietary at the end of the day. It's a weird nit to pick. Why even bring it up at all, unless you're desperate to defend Redpanda?
I can see the source code of Unreal Engine too. Does that make them "further into the open source world" than WarpStream too?
I don't have a horse in this particular race but WarpStream's blog post is a lot more charitable towards the project in question, and the open source world in general, than Redpanda's.