It’s been this way for 4 years. 48 of 49. Every so often I will hop on and see if I can find someone online to race. Managed to find someone online to get the Hillclimb achievement but never the rally one.
I still have yet to unlock every achievement on an Xbox game. I got every achievement in Uncharted Golden Abyss on PS Vita, but never on Xbox. Next closest is Mass Effect 2 which I am currently pushing through an Insanity play through of to unlock the final 2 achievements (Complete game on Insanity and complete Shadow Broker questline on Hardcore or Insanity). Fun fact: Insanity mode has me taking 3 times longer to progress through the game than it does on Normal mode.