I thought the 7 fin was never discontinued because it was never a released product, and was done in very short revisions with short lifespans, and the one that everyone really wants was a special run done by dynavap per users request.
We haven't seen any changes now on the ti tips, for awhile.
Also you sound like a person who was sold on the marketing of titanium, the tolerances on these pieces are wiiiiiiiide open, meaning joe schmoe on a lathe in their garage can produce these things. There is no precision anything, machine shops in high school can mass produce these things.
And yes mass produced things means prices get cheaper, the cost of titanium will blow your brains if you buy it in bulk, I dont need to go into this further, just literally take your stem and tip to a machine shop and ask them how much it time/$ it would take to make 1, then how much it would take to make 100,000. Take the cap to a sheetmetal shop and ask them how much to cut and weld the cap together for 1 and 100,000.
I stand my ground, the most expensive thing is paying the human to assemble the orings, tip, stems and cap do some qc (if any) and place it in a storage container. Total costs of material is definitely less then $10