How wrinkly is too wrinkly?

So I know side wrinkles do not indicate the need to water. You wait for the top to get the pizza crust look.

I honestly can’t say when it started. It can’t have taken long because they’re the first thing I do in the am. Turn on their lights. So I have my eye on them fairly well. So I don’t know how I missed it🤷🏻‍♀️. Maybe I was mostly focusing on the tops. Lesson learned.

One wrinkly side is hard like a shedding leaf. The other is soft, not squishy, the way an outer leaf gets as it’s being absorbed. Is it stuck?

I haven’t watered it in the maybe 4-5 months I’ve had it. Just switched substrate. It was an overwatered HD buy.

I’ve dealt with rot and this is not rot. At least none like I’ve seen. But I’m a newbie and could be wrong 😆.

The top doesn’t look thirsty to me.

Any ideas about what’s going on and advice would be much appreciated. Thanks.