That is true, and I have some re motored HOn3 locomotives that need running in. This is the only loop of track I own.
This layout got flooded. It was in the garage under the upstairs bathroom, and the fill valve broke in two in the toilet up there. The bathroom, and part of the hall was flooded, but most of the water landed in the garage.
The layout was under a cardboard box that got wet enough to come totally apart. Thankfully, I had painted the plywood on both sides before installation, so it did not warp. The bridge deck was deformed, but did not come apart, and I found it wile it was soaking wet, and was able to straighten it out before it dried.
I had glued the flex track down with white glue, something I highly discourage. I was lucky, and it only came loose at the ends of sections of track, The loses ends did not reattach, and there is homabed under the track, as well as plywood, so I will be able to fix the kinks quickly with 15- 25 spikes.

One big advantage of a portable, is if you are about to undertake a messy job, you can tote it outside. I mixed up a batch of dark gray acrylic paint, to get a base coat all the way around this puppy.
It is still outside, waiting for the paint to dry, as it is a very tight fit into the garage past the Wife's 06 Miata. The other garage door won't open, since a wild turkey Tom crash landed into it. One of the joys of rural life, a mile from the county courthouse.
The next step is to fix the kinks, so I can run the fire out of some narrow gauge trains.
Later I will do some scenery work, especially a central mountain, that will be removable, so the layout can be used under the Christmas tree. Possibly I will work with Dr Tom , and do winter scenery.