Well remember patch.. uhh..
D15 had the MRT, which was 12/7/03 (wow!)
But that was still S1, that was the only 'new' car added to S1 since it was released.
S2 however, we have seen the FBM, and the Scirocco.. made an appearance, however has not gone public (which for some reason.. soooomeone hasn't updated the LFS.net website to show FBM!)
However we also gained dramatic interior changes in several cars.
July 17, 2003 S1 was released, June 25, 2005 S2 was released.. well, so much for that two year thing, but on a serious note, changes are FAR FAR more dramatic during the stages of S2 than any test patches from S1 ever were.
This is probably because once S1 was released, Scawen, Eric, and Victor had already begun on S2 (old shots of aston exist, etc.)
The patches we saw in S1 were more of fixes and glitches here and there, the MRT was the biggest thing that came into LFS.
However, S2 has been very different in this matter, instead of going straight to S3, the team has decided to .. revamp everything, and give us a better progress publicly, aka instead of holding everything off for a new release, over the years in S2 we have seen many physics updates, texture updates, model updates, etc. etc.
For me, I think during S1 it was always about the future road to S2, but so far during S2 the devs seem quite happy and want to stay here on level base for a while and get everything ready for S3..
which..
.. after S3.. will we see updates? Or will that be the end?
We don't know, and I wouldn't be surprised if the devs are 100% sure about it either, which is why they are just fine sitting here in S2 where there seems to be plenty of work to do