My Enfield and Eastern mega-route tops out currently at 236 MB. The total length of the main line is now about 150 miles and this doesn't include yards or branch lines. With all things considered, such as the amount of buildings, trees, and splines, the playback is actually quite doable on my system.
The only drawback I have with the route this large is maintenance and at the current stage, it's beginning to show its age. I started this in the end of 2004 when TRS2004 was shipped. There are sections from the earlier years still in there and they have been mostly upgraded. You can tell that they are older because my route building style has changed so much over the years. Other sections I have rebuilt look pretty nice and the performance is far better than the older ones. For some reason I can't figure out why this is the case, but it sure appears this way. Perhaps this is due to the better choice of content, or maybe the elimination of the older content that was there previously.
John
John
Trainz User Since: 12-2003
Trainz User ID: 124863
T:ANE Build: 94829
TRS2019: 98592