Why doesn’t anyone make a flex head cordless ratchet? It wouldn’t even have to flex too much, something like a flex head torque wrench. Sometimes having 10 - 15 degrees of flex would be all that is needed to get into a tight spot.
It doesn't require a magic act and has been done a fair few times with pneumatic ratchets. The solution is to put the flex point at the area where the yoke and drive shaft meet which can be angled a fair a bit without any effect on the way it drives. Cordless and pneumatic ratchets function identically in how the yoke is moved so it could certainly be ported over.What Astro does on that tool, basically install an airline swivel between the head and the handle is so much easier than trying to move power being generated in the handle to the head of a tool that flexes. One's a no brainer the other requires a magic act.
Pneumatic is different as the air motor is in the head. All that is needed is a joint to carry the air from the bottom of the handle to the head where the air motor is located. With a cordless the motor is in the handle and not the head. Getting the rotational force through a joint is going to be a problem.It doesn't require a magic act and has been done a fair few times with pneumatic ratchets. The solution is to put the flex point at the area where the yoke and drive shaft meet which can be angled a fair a bit without any effect on the way it drives. Cordless and pneumatic ratchets function identically in how the yoke is moved so it could certainly be ported over.
The real reason it hasn't been done so far is probably the design and tooling costs to manufacture a niche tool. Pneumatic ratchets that flex are not popular. Most people just want more power and faster speed.

Pneumatic is different as the air motor is in the head. All that is needed is a joint to carry the air from the bottom of the handle to the head where the air motor is located. With a cordless the motor is in the handle and not the head. Getting the rotational force through a joint is going to be a problem.
Wwweeellll...Mentioning Snap-on and cordless reliability together, like its some long stand hallmark of theirs, is a laugh. Their best stuff was made in China. Sounds like I'm trashing them but it's the literal truth. The US assembled stuff was a disaster in my experience which stops at products released in the last 3-4 years. You're literally throwing money away. The Chinese stuff was decent to good, just massively overpriced. The off the shelf brands are generally just as good or better and aren't priced like you're buying illicit drugs and most carry comparable or better warranties.
Wwweeellll...
It was an example based on the question at hand...an electric flex head ratchet ... and used SO as the example because the industry that would use an electric flex head the most is the automotible industry. If it were an easy cost effective task to make one reliably they certainly would have an offering given how much they're involved in the auto repair world.
As far as the "off the shelf brands" vs. SO....
You do realize there is more to a tool than just getting all giddy watching someone on Youtube say only brand "X" removed that 10 million foot pound fastener and Snap-on's didn't.
Maintenance, internal component size are all a very important factors for the performance and durability of said tool.
Funny...but wrongYou said reliability right? Isn't that what I also mentioned? Nowhere did I reference performance metrics or YouTubers. I was referencing my own experiences of myself and those around me. Snap-on has an extremely poor track record of reliability in cordless. I personally had two different model impacts burn out triggers and illumination lights within months of purchasing. Their polisher use to eat motors like it was designed to burn them out and the first iteration mini impact liked to detonate it's hammer mechanism. I know their newest 1/2" was shattering it's anvil on release as well. That's just to name a few so you'll have to excuse my virtual snicker at you claiming Snap-on field tests and builds a reliable cordless line.
Snap-on is also lagging well behind the competition in cordless technology so just because they don't build something doesnt mean it's not feasible. Milwaukee has kicked their *** with brining tool designs to market repeatedly.
You're attempting to champion a company in a market they not only do they not lead in but they were something like 10 years late to. I still don't think they have a true high capacity battery on offer or really any battery selection at all.