I have in recent months visited a few folks who are building their first really big layout. By the time I got there to see their progress, it was already too late (tracks down and/or ballasted). The workmanship of putting the sections of track together was really poor and gaps of various sizes were all over the place. Most on Gargraves where cuts (but not only cuts) were made.
I think this is an essential and fundamental aspect of getting a layout started. It provides reliable operation and cuts down on the noise factor considerably.
Gee! I hate to see poor track workmanship..... It detracts from the beauty of other work surrounding it and really looks crappy when a close up photo of a great scene is taken that has a track gap in it.
Get it right from the get go.