My understanding is that it is manufactured by Novo Nordisk, the makers of more modern, name-brand insulins, as well (they make the fast-acting insulin aspart called Novolog that I take as part of my own regimen).
For further reference: https://diabetesstrong.com/walmart-insulin/
That's what my brother used to take 20 years ago.
They are not exactly 'inferior technology' and there are uses for them. But you are right that diabetics these days don't generally take them.
There are generic long lasting insulin alternatives, but none that I know of are available in the US. I believe that's what CA wants to do.
The modern programs of a combination of fast/slow analogs are more flexible and adaptable. The demand on the user is still pretty high, but it's a bit closer to baseline.
EDIT: and I guess I should say, I've got plenty of bias from my own relatively narrow experience. I'm sure there are different regimens and different opinions amongst various doctors
Walmart sells human insulin (the previous gen stuff) for $25/vial. It’s manufactured by Novo Nordisk. It’s what was regularly prescribed in the 1990s. It has downsides, such as requiring a strict eating schedule: https://diabetesstrong.com/walmart-insulin/
Most doctors today prescribe human analog insulin. They do this because it is better at controlling blood sugar without requiring strict eating schedules.
https://haiweb.org/wp-content/uploads/2015/05/HAI_ACCISS_fac...
It looks like most patents are expired. I hope this should open the way for effective analogue insulin to be manufactured generically.
whatever the quality of life improvements of the newer stuff is its worth pointing out there's a doctors-getting-kickbacks scandal every few years https://duckduckgo.com/?t=ffab&q=prescription+kickbacks&ia=w...