I tend to use 1/4dr more than anything, plus the ratchets are small and cool and generally affordable to acquire so I have a lot of interest in 1/4dr.
I'll start this off with something different I just came across, I think it's a UK brand though so availability here may be limited.
The brand is Sabrecut.
Theres the MRSCO4
And the MRSCO5
A pretty cool little 1/4 ratchet, square or hex drive, with what appears to be a 1/4 flex head or " breaker bar " on the other end.
I can't find any information that says but you'd think it flexes.
The only concern is those hex bosses protruding through the body of the tool that could mean it fixed, maybe they had to affix a tool steel anvil in place because the body of the ratchet is stainless steel ?
It would be pretty cool if it did flex.