Is GDC a solid option versus LDC?

[rempas]

 From what I know, most people (if not all), seem to prefer LDC 
over GDC. When it comes to C, I always prefer GCC as GCC's 
backend compiles code faster and also produces code will run 
faster than LLVM (even if the differences are small). When it 
comes to D, GDC seems to compile code faster in my machine (AMD 
Ryzen 5 2400G) than LDC about 3-4 times faster!

However, I'm really skeptical as to why people seem to prefer LDC 
and I wonder if GDC is not as stable and reliable as LDC or if 
most code that uses recent code doesn't work in GDC. I have also 
heard that LDC get support for new things faster than GDC. Is 
that true? And if yes, then for how much difference are we 
talking about?

Any personal experiences would be much appreciated.