There very little difference between interfaces. Atleast on normal workloads anyway.

Thanks for the clarification. I Think you answered everything. I have one more question. If random speed and access time are the most important features of an ssd and sequential speeds matter very little, then does it matter if you use sata 2, sata 3, or even pcie for consumers? They should probably see no difference, no need to upgrade.

>Why not just use MLC from the start?

Because TLC is cheaper, as you can cram 50% more bits into a given cell.

> But everyone one is saying the average consumer won’t know the difference, but I’m not sure if that’s true.

It is.

>Because if you copy or backup large files there has to be a difference in the time it takes and most consumers are going to copy or backup large files eventually if not regularly.

How many consumers actually make backups or move large files around when streaming is the thing ?

>Why make any ssds that can only move large files close to hard drive speeds sata 1 100mbs when we have sata 3 at > 500mbs.

Because ssds are soo much more than just sequential speeds. Actually, sequential speeds matter very little, its the random speeds and access times, that blow hdds out of the water.

>The ssds start fast but slow down as soon as SLC or cache is used up we need nand that can stay around 500 all the time at an affordable price.

Most cosumer workloads are exactly that; smallish and in bursts.
And besides, most of the workload is reads and pretty much every ssds can hit 500MB/s, even tlc ones (without the help of slc).

If SLC is better than MLC which is better than TLC, why use mostly TLC with some SLC for a boost? Why not just use MLC from the start? It seems like the write speeds of ssds are going in the wrong direction for entry level ssds. But everyone one is saying the average consumer won’t know the difference, but I’m not sure if that’s true. Because if you copy or backup large files there has to be a difference in the time it takes and most consumers are going to copy or backup large files eventually if not regularly. Why make any ssds that can only move large files close to hard drive speeds sata 1 100mbs when we have sata 3 at > 500mbs. The ssds start fast but slow down as soon as SLC or cache is used up we need nand that can stay around 500 all the time at an affordable price.

Yeah, but ncache does help with endurance, as its pretty much SLC. And SLC is much better at endurance and write speeds.