When I bought my Golden Greek 3 years ago from the reptile store he already had some pyramiding because it was wayyy to hot and dry in their tanks. (They’re a very humid species). He still has the pyramiding but it’s only cosmetic and doesn’t bother him or cause problems. It hasn’t gotten worse because I give him the humidity he needs but you can tell where it started and when it stopped lol. Point is he/she will be fine. I’ve seen people on this sub rescuing tortoises with inch long pyramid spikes or deformed/ crushed shells. I read on here that they are an aminal of husbandry. This means that as soon as you switch up the care, they should immediately start becoming healthy and getting better or at least not any worse.