The aluminium bed is screwed on. If it were to warp, bad day for the rails 'cause the steel frame won't budge.
I don't see that happening since 110°C doesn't seem enough to do stress relief on aluminium... When we start printing over 300°C I'll start worrying.
The kapton holds well so far, a wet cloth is enough to remove the glue. A removable plate is not high on my list right now.