I’m not trying to sell the ladder method. If floating works for you then go for it. I just wanted you to see that the ladder does not have to be visible,
My layout has many roadbed methods in use, all with their pros and cons…
Raised on 1x4 PT Lumber - Track attached to lumber with screws. In place for over 5 years. Some warping needed to be corrected but still working. Very low maintenance.
Trench & Fill - Base is processed stone (1/2" to dust), thin layer of stone dust on top, Float track and ballast with more stone dust. Generally has worked well for me where I can get the trench deep enough. Track does tend to rise up over time as new ballast is added. Ever\y other year I end up pulling the track and cutting the ballast down.
Concrete Roadbed - Track floats on concrete with ballast on top. Very stable. Also in place for over 5 years with no major issues. Ballast does tend to work itself under the track raising it up similar to the Trench & Fill method. Difference is that the maintenance of that issue is super easy - lift the track, sweep up the ballast, put down track and ballast. At my switches I use no ballast in the point area. Stray ballast can be washed away with a strong stream from the hose.
Buried 1x4 PT Lumber - Track attached with screws. Much more stable that the raised PT lumber. In place for about 4 years inside Deep Cut. Most was removed when the cut was covered and a tunnel installed. Still in use inside the tunnel section, but now has air space under it - floating on corrugated pipe.
PVC Ladder - Track screwed to ladder. My new standard. Coal dump Curve and Walk Landing are both on PVC Ladder. No issues at all with ballast pushing up track. I do get some frost heave of buried uprights, but they push back easily in early spring. Least maintenance of any method I have tried.