My X-RD3 has 7 years and 7,100 miles. Never a speck of trouble
It's been with 46T/ 17/18/19. After several years with the 19, I just switched back to 18.
So it's the same as my SA XL-RD5w middle gears. I'll have to see how I like it on the highway. With the 19T, the shift was at 10 mph.
2:1 is just laughable, like a 1x with 30T drive. LOL.