I just cited history rather than ignored it. That included Burrough's and LISP machines as examples past my linked essay in this thread. However, your side is ignoring all historical examples of proprietary OSS and even how non-proprietary OSS operated then vs now. Old model of academia varied from MIT/BSD-style to paid w/ source model.

So, your rendering of open-source history is false both in academia and commercial sector. It's always been a mix with proprietary favoring closed source due to financial incentives, especially lock-in. Nothing precluded more paid OSS strategies aside from culture of organizations involved. As dual-licensed projects and proprietary w/ OSS benefits like this one show.