Yup, I agree, around-the-walls is a good design strategy, and I have done plenty of those in the past, but larger than a 10'x10' space. Larger layouts are more daunting for beginners, and I try to stay within a moderate footprint. Allan Miller at OGR favors smaller layouts for his magazine as well (where I often publish), as he is trying to grow the hobby with plans for those new to the hobby. So those considerations are in the background when I develop smallish layouts: 4x8s, 5x9s, 6x12.
Here is an 8x16 around the walls and also modular layout I did back in 2017:
To me, around-the-walls layouts can also tend to be a bit boring, as you are always seeing the trains from one side, one angle. The above layout is just two loops, no reverse loops and train routing. A great scenery craftsman can make these layouts better with lots of scenic details.
Here is a larger around-the-walls in 12x20, that I tried to make interesting with some variations and extra features, like the On30, staging track/yard, corner access area, and the turntable peninsula: The connections between inner and outer mainlines are in South Junction, and the double-slip-switch at North Park.
Here is an 11x14 around-the-walls design for a dining-room size space, with a conventional 4x8 embedded:
Here is the layout I am still hoping to build, an around-the-walls with variations: Its a busy layout, making the most of the space. Perhaps too busy for some.
Here is a around-the-walls with turnback loops, but with one side pulled back from the wall to expose two sides of the length. This design is the kind of concept you might see for HO or N in Model Railroader, but larger for O. This one was a lot of fun to design.
One of the many layout design considerations that I think about is what might be called the "train viewing perimeter", that is, the length of the exposed layout that a person can stand/view/operate the layout along. After all, a layout is built to satisfy us people, not just the needs and goals of the model RR. We like variety and interest, and cool views.
If you study the design, you will see that there are two highlighted reverse loops incorporated in the plan, but I tried to make them not stand out, but seemingly natural connections. I used MTH ScaleTrax for the branchline and yard, for visual interest and to highlight the different function. With the "too-wide" tie spacing of ScaleTrax, the use in the mountain branchline and inside the yard is reasonable. Modern railroads build everything to the same specifications, with the weight of the rail varying by use. When I was a kid, I could still see lots of track and connections built to cheaper or lighter standards (back in Fargo N.D. in the '70s, GN, NP, and Milwaukee Road).
Here is another, a design for a client that is in construction. Again, a blast to design, and I learned a lot and incorporated good suggestions from forum members.