Yes I have seen this. The disk write speed randomly gets super slow and tons of stuff just locks up at random as many many programs assume it'll be fine to do little writes synchronously. The whole machine becomes totally unusable.

I see it on computers (and phones too) whose owners bought the smallest capacity to avoid spending money on something they didn't think they would use.

That's not what happens when an SSD reaches the write limit. It'll simply not let you write more data and becomes read only.

I have personally experienced this issue. It just gets very slow before slowly dying outright.

On a Mac?

Yes I have seen this occur on multiple MacBook.

What on earth are you doing to make that happen? Either you’re use case is thrashing the SSD, you have a faulty part or you’re exaggerating.

Um, I don't know. Exaggeration? No, I only wish. Faulty part or not, it happened years after the purchase.

I've never had an SSD that just stopped allowing writes and returns an error. Instead it gets slower and slower until at some point attempting to write anything will just block forever. The process trying will be stuck in the I/O wait "D" state in Linux and be basically unkillable.

You can search this very forum where we posted stories when the M1s first came out, that they were churning through several percentage points of the life of the SSD within just a couple months. I think that was caused by a bug however