Lee
Age and health issues have been the key factors in my dismantling['08 &'09] large layouts at two separate locations in favor of a comparatively a small 9x16 round-the-wall attic layout of recycled components. Fortunately I got the attic layout wired for railpower and turnout operation in Feb '10 prior to developing disabling health problems.
One objective was to simplify by discontinuing electronic modules for switch operation from a hand held remote in favor of direct toggle control from a fixed location. I also recycled my hinged drop section from one of the other layouts to avoid ducking under. I am whittling down from about 50 engines to 6-8 favorites[if a units electronics fritz up its back to the shelf to become a book end].
Additionally I have plain old dual mainlines for round and round operation which I have always favored. A Service Yard on one side of the layout and a Village[planned] on the other with only one short spur. Denim Mill in one far corner and Sawmill/Lumber yard in the other. Dust will probably be more prevalent than groundscaping/scenicking. No smoke and chuff #or sound at all, is irrelevant for me
I still have TMCC/Conventional capability but I expect there will increasingly be a majority of static scenarios as compared to an all active operation. Although there is an accessory & lighting Bus, I doubt that I will ever light my Yard and Village structures which are all held in place with Velcro. However I will get a son to crawl under and connect my Switchstand Light drops to the previously wired T-strips[I can get down but back up is iffy].
As regards work on the layout, pain is certainly an issue at times but far more of a handicap is loss of strength and stamina. But I can't complain, at 82 I am still "vertical" and navigating about, albeit with several aids including a stairlift. As regards layouts, in particular "senior citizen" operations, I now rationalize and advocate that "small is beautiful" and "unfinished" is simply a constant indicator of ones layout progress.
Now on to establishing a Village, more or less, after I rest awhile.
Low tech control center pictured, power center under layout mounted on wall.