Of course this won't happen because of all the business travellers.
But I've noticed that lots of time is spent trying to stow carry ons and close overhead bins.
Just ban carry ons and reserve the time for getting people into their seats.
Disclosure: after my last misrouted bag, I have probably checked bags twice since 2011.
It is spent waiting on bags in the terminal.
Solve each problem independently and stop trying to mix them.
Also, we don't have to ban carry ons, we can use Hacker News and Reddit's favorite blunt tool - taxes.
Apply a large add on cost (taxes) for each carry on. The larger and heavier, the more add on paid.
This would also offset the fuel costs of carry ons.
Of course business users could just expense the carry on add on cost, which preserves carry ons for them
Checked luggage are weighed and accounted for at check in.
For passengers - just assume 136 KG (which is really generous) times (the number of seats plus total crew)
I know that I'm a data point of one and am really just unlucky, but regardless, I am quite simply never checking my luggage ever again.
I have to imagine that if carry-ons were banned, and thus the amount of checked baggage increased, more luggage would be lost. Also, more time would presumably be spent waiting on the tarmac while the luggage is loaded, so all this "saved" time would really just amount to more time spent sitting there doing nothing.
So yeah, this suggestion is a hard pass from me.
But I've been checked bag gang for life.
It's so easy to walk around an airport and board a plane without dragging carry ons behind you.
The worst issue I've had, knock on wood, is broken roller bag wheels, but the airlines have always compensated me a new luggage credit.
As I understand it, the right thing to do is go shopping for the clothes you need as soon as your bag is missing, and then request reimbursements for those costs.
This is congruent with how the claim process worked out for me. Although perhaps airlines have been working on weaseling out of their liability in the name of cost cutting.