I think the biggest problem is their reputation and big sequential numbers that reviewers concentrate on, and overall people not paying attention to the nitty gritty. For instance, having a 100GB SLC cache means a drop in those big numbers faster than other drives, and happening even quicker when you're hammering the drive both ways. And these numbers here being the most important when it comes to real world usage and what people feel.I have read a lot about the 980 PRO's being very good for not only R/W speeds, but Gbps speeds as well. That's why I went with them, TBH, not including them being on sale.
My overall biggest disappoint and why I feel the cost isn't worth it is the drive being TLC instead of MLC which drops the endurance quite a bit, which is what Samsung was known for as #1. I'm sure the 990 Pro or whatever else they come up with later as a Gen 4 refresh or Gen 5 drive will hopefully fix these bullet points. Outside of that I am 100% on board with Sabrent now.
The past year my machine has been used more for photo editing, video editing, and mining than gaming. Running 4K edits in Premiere is where I noticed the biggest difference and I honestly wish that my D drive was another R4+ for scratch and holding the media files. It's why moving to Alder Lake is a talking point for me now having the ability to use a Gen 5 boot for OS and programs and having a Gen 4 without a bottleneck as a secondary. Having 20Gb capable externals is a plus. I really want to move back to my X299 rig for having 64GB of RAM but then I'm limited to Gen 3 and 6 cores.but building a "work" machine for the first time that is not gaming focused, I think it's a decent experiment.
Edit in fact I was editing and converting this DNG in Photoshop while I was typing this (waiting for it to export) 2 months today!