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

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. Edit: I should clarify this is what I've seen with nvme devices in particular.