One quick suggestion: assuming that 100% of distributed cups are used seems quite aggressive to me. Using a 7.5 year average life I think suggests you are implicitly selecting on very enthusiastic adopters; I would imagine a lot are distributed and then discarded.
That’s fair. I think it’s probably a bit optimistic too, perhaps 5 years or less would be more realistic. Again I’m surprised we don’t have solid survey data on this too, the issue really is under researched.
Thanks for this very interesting article.
One quick suggestion: assuming that 100% of distributed cups are used seems quite aggressive to me. Using a 7.5 year average life I think suggests you are implicitly selecting on very enthusiastic adopters; I would imagine a lot are distributed and then discarded.
That’s fair. I think it’s probably a bit optimistic too, perhaps 5 years or less would be more realistic. Again I’m surprised we don’t have solid survey data on this too, the issue really is under researched.