EMS is not likely to ever embrace the modern because they ignore and belittle their past, not learning the lessons of EMS history, unlike most professions. Way back in the 60s and 70s Ferno promoted their One Man gurneys to funeral directors and largely discounted the EMS side, instead providing EMS with the venerable Model-30, designed in 1958, as the industry standard. The Model-30 was based on the deservedly hated Ferno Klever Cot model. The 30 was a good reliable gurney, weighing in (airc) right under 100 lbs. The only problem was that, by the time you placed your patient on the hospital gurney or bed you had already lifted the patient's and/or stretcher's weight as well, close to 7 times. And it required the two EMTs to be totally in sync with each other to smoothly raise, lower and load the gurney with patient aboard. It took a while to get coordinated if you were a short guy like me working with a burly 6 footer.
I've had 2 surgeries on my destroyed knees thanks to using the Model-30, and I thank the Good Lord that by using "good body mechanics" my spine survived the Model-30 days intact. Like my surgeon (an ex-EMT) said, "We can replace your knees later if we need to, so consider yourself lucky. We still don't have replacement spines..."
The simple invention of loading wheels on the Model-30, making it the new Model-35 was a step in the right direction. It was copied by Stryker-their X-Frame device weighed about 135 pounds unloaded-but the loader still had to bear the entire weight of the stretcher and patient while his/her partner lifted the main wheel carriage so the gurney could be loaded, requiring great upper body strength for the crewmember doing the loading. That was largely due to the fact that most modern ambulances are variances of commercial trucks with an unusually high rear loading height. With stretchers becoming heaver (and you still have to push and maneuver the things with all that mass of batteries and electro-mechanical complexity while wheeling your patient), maybe it's time to rethink ambulance design and work from ground up to move forward. With every new "advance" in the industry comes a whole new set of problems-and we're not even factoring in the cost of the stretcher which is getting more expensive than a late-model used car!
The Brits were far ahead of us, utilizing effective loading systems in Bedford ambulances for many years now. They were the pioneers in protecting the knees and backs of their EMS workers while the USA was essentially utilizing the manual X-Frame stretcher that was originally developed by Richard Ferneau and El Bourgraf in the late '50s, after they watched Ferneau's wife put away her collapsable ironing board (the original x-frame device).
I hope one day to see a fully modern anti-gravity stretcher, now that would a heck of a cool thing to work with.