Yes!! And on-tank humidifiers that don’t periodically try to drown you! And nasal cannula s that actually fit smaller adult noses!

I would like to see someone come up with a cord reel for an oxygen line. Getting very tired of it hooking on to things it shouldn't

The technology for POCs hasn't changed since they were first developed. There are basically two problems: the sieve beds and the batteries. They've been able to reduce the size of the sieve beds somewhat, but the batteries are still pretty heavy. That's the problem: to get more than 1.4 LPM requires much more weight to produce 02 and that makes the unit not portable. If they can develop new technology, there's always a chance that we'll have at unit that produces 6 LPM. I've always had a vision of a unit that would clip on my belt and a battery I could put in a pocket that would produce enough 02 so I could exercise really hard. I've been talking with manufacturers about that for nearly 20 years, but we're not there yet!

And cat proof hoses (sigh)