I really love the sudden surge of open sources businesses coming out of YC and in general. I share some of the same sentiments in the post, having open sourced my SaaS business of 7 years earlier this year. One of my main driving forces was market pressure from enterprises wanting to self-host. One of the other drivers was my bus-factor of 1, as was longevity as you mentioned. Time will tell if the distribution side of things will ring true for my business, but I'm hoping it will judging by initial growth i.r.t. CE.
I wrote more about my "whys" here [0] if anybody is interested in a similar post.
[0]: https://keygen.sh/blog/all-your-licensing-are-belong-to-you/