I recall a thread about bunker tongues a while ago.
Comments were made about maintaining them, specifically how they can dry out and crumble and lose shape unless considerable amounts of water is used, and water isn’t something that’s universally available in our worldwide game.
And when money it tight and the manpower, water etc resources are on the short side then bunker maintenance tends to be one of the first things to be neglected, which is maybe why elaborate bunkers tongues and intricate bunker edge shaping tend to dissipate at many courses over time.
Atb