I've probably gone through hundreds of these cut off discs over the years and never had one "clog" and stop cutting. These are abrasive discs that abrade as they cut - they dress themsleves as you go.

You don't dress cut off wheels. You cut with them carefully and if there are chunks missing the disc is garbage.

I've only ever had a disk clog when I tried it on non ferrous metals when it wasn't meant for them.

You only ever dress grinding stones.