What other racing sim lets you drive so many 90's and 00's cars? Who cars if they are in "standard resolution" they are there, and I can race them againsts brand new cars.
GT should always stay around, so should Forza (even though a new game every 2 years is excessive).
Looking forward to racing my 2001 Acura CL Type-S or a 1998 Civic Si Type R against a modern Civic, and pwning it (since they haven't added hp in Civics for 15 years, but added weight).
Heck I love how GT has so many old cars, I can really compare cars I/my friends own against newer cars. That Nissan 300ZX fro 1998 looks amazing, but how much slower is it then a BMW 135i?