Drives made with SLC flash memory are practically nonexistent. Affordable ones completely so. Times have changed.
Yes, there are many SSD SLC with afforable price right now too, for example ADATA SU650 I used. The benefit SLC over other types in the video I provide before are after we secure erase our SSD. SLC provide less latency than others, and trim from SSD controller are not enough to clean the data or reduce the latency after using it for long time (based by research in the paper). And from point of security as the main topic in paper, show a good point that SLC give more clean data format than others for privacy minded people (focused on that right now). I’m still searching the latest paper about this topic… still stuck in this because others not explain well or have proof with research / comparison as this.