Just musing on a lazy afternoon.
My exceptions to my rules; I own some inaccurate cars.
I have 3 of the Flyonel US Forest Service cars. I have a friend who is a forest ranger, and he has an AF S Gauge set he brings out at Christmas. I bought them to run on my layout, maybe one day he would be in town and drop in and see me and I would have the cars running on the high=rail portion of my layout. And the colors are subdued.
Yes, I do have all my old Flyer from when I was young, and a High_Rail "racetrack" to borrow the CB&Q term will incorporated into the trackplan. I like my roots too much to let them languish on a shelf. It will wind through the scenery and compliment a code 100 full scale operation oriented branchline which will be the main focus of the layout.
From the Ohio groups, I also purchased the Sherwin Williams, and Timkin cats. I ordered them in High-Rail just in case they really don't have prototypes. Don't recall seeing a Sherwin Williams tank car, but it looks plausible. Too lazy to do the research at the time I purchased them. Still haven't. One day perhaps.
I had no qualms about ordering last year's CB&Q plug door AM boxcars masquerading as reefers from Stateline, and will probably get the Chicago group's IC plug doors that should be reefers this year. The jury is still out on their covered gondola, as they added an IC herald on the covers that should not be there, but someone thought they'd be more interesting that way. I guess the covers could end up in the parts box.
I must own some other fantasy cars, but the number is low, so I can't recall them right now.
So I am nor a rabid rivet counter, though I may play one on social media from time to time when some group trots out their clown cars in lieu of a prototype paint scheme, not like their area has no railroad history.
I'm just too quick to post sometimes.