"Mark²" mjmorgan(lowest even number writes:
The others nearly are continuous ink systems...with their 220ml carts.

Hmm, well I thought the idea of continuous ink is that you can use
bulk ink without the manufacturer shaking fingers at you. Don't they
charge a fortune for those carts? It looks like an 220ml Epson cart
is around $85 discounted, or $386/liter, vs. about $25/liter for
gallon bottles from refill places.