I don't know about others on this forum, but I am just really happy to have the 15C back again, loose keys, bugs and all.
I lost my original about 5 years ago to a strong EMP. A tech tried to fix it, too much damage. That series was a true shirt pocket calculator. While I occasionally use my 12C for financial matters, it's really useless for my work. I really do not see why hp stopped manufacturing the 15C, along with the 12C, they have such a great form factor. One Science, One Business.
If hp is going to continue manufacturing calculators, I think the 15C should be a Standard edition and not a Limited one. They could ditch the 35S, and that other one that looks like an automobile grill. Those two don't even fit in your pocket well. If the new 15C is hard on batteries, so be it, I'll buy extra. The old one was all I needed at work, and the new one will be too! Well done hp, well done.