Crowns and veneers can always be removed. Invariably...
Crowns and veneers can always be removed. Invariably however, there is always damage to the underlying tooth structure.
It is much more so with crowns, but even with veneers that are mildly or not prepared, it is impossible to remove them without damaging the underlying tooth structure.
There has been much talk about no-prep veneers, but these are rarely effective, particularly with stained or protruding teeth.