Sorry, I'm not on the network team and I don't know whether that specific forum comment is accurate.
All I can say is that if you use Workers, the Worker always runs in the datacenter that receives your request, which is exactly the same datacenter that would have received your request if you weren't using Workers.
I'm referring to e.g. https://community.cloudflare.com/t/does-free-plan-cloudflare... where the poster says:
"For predominantly Australian traffic, you’d probably need CF Business or Enterprise plan. For India traffic, would need CF Enterprise plan."
Where do workers run in this instance and what impacts are there say if I'm not on a business or enterprise plan?
Point being if we do need an enterprise or business plan for these features it's not 100% free.