Hello! I’ve had this cactus for nearly 3 years now and in the past few months it’s started to look a little worse for wear. I did just repot it for the first time (I know I should’ve done it sooner) and I’m propagating one of the leaves in case this is the end for it. It’s got these light brown spots and cracks on one side and the base looks dark brown. The leaves are also pretty wrinkly (which used to only happen when it was underwatered but now it’s always like that). Is it root rot?