I am amazed of the "newer must be better/old stuff is junk" mentality for scuba regulators. There has been little to no significant improvement in open circuit regulators for decades. There is a reason I dive my double hoses frequently.
And to add, with the European CE certifications that manufactures seek for their regs now, the newer regs don't breathe as well as many of the older ones. Case in point, my old G200 out breathes my new G260.