Well I took this is a challenge. I did buy and was just waiting on my flash drive to give me it's last boot. RIP Lexar M45 (9/21-7/23) ðŠĶ
I bought the Innodisk 3ME (https://www.innodisk.com/en/products/flash-storage/usb-and-usb-edc/usb_drive_3me) digikey had it for "just" $51 for the "EX" which is the extreme temperature version. I figured when already paying 2-10x for a flash drive might as well spend that extra $8 to gain -40C and +15C (to 85C).
I could've gone SLC, but on paper it looks like the main advantage is 3 more years of warranty. Innodisk warranties SLC to 5 years, MLC to 2. I know SLC is better, but in today's age of 3D QLC garbage MLC is pretty good and at half the cost of the SLC version I'll just pocket the difference and pony up for a new one if it makes it at least 5 years (my arbitrary cutoff to make this drive worth it).
I've gone through 4 flash drives since I started using Unraid. Only 1 time was I caught without a flash backup.. never again.. I even had Unraid Servers plugin I just wasn't paying attention to it and it went out of sync at some point.
But I must say I am tired of replacing drives every 1-2 years even with backups. I've tried everything to try to make the drives last longer - internal USB, rear, and front. I've tried all metal and plastic. Switched brands a number of times. No noticeable difference.
I will be back here if this drive fails. 3,000,000 hours it should outlive me, but I know MTBF doesn't mean jack most of the time unless everyone here is equally unlucky.