A while back I received a free custom built enclosure. It had previously housed a beardie.
This enclosure had the adhesive tiles in it...HAD.
Many of the tile corners were broken off, sections were lifting, etc... I would say that over 20% of the overall floor space was missing tile, with several other sections lifted and intact, but with substrate underneath, which meant it was only a matter of time before those sections broke off as well.
Removing the tile was the first thing I did to refurbish the enclosure.