[citation][nom]kawininjazx[/nom]I love my 16GB Nexus 7, except I got the "sluggish bug" when it started to get full, I deleted stuff and it's still a little slow, gonna have to restore it. Of course, now the 32GB version is the same price. Oh well, at least I didn't buy a $500 iPad 3 which has already been replaced.I still feel the Nexus 7 is the best deal in tablets.[/citation]
That bug is due to the flash memory used. If a tablet maker were to use SLC flash then you would get an extreme performance boost.
Android does not do any kind of TRIM command or even garbage collection (for example doing a FF fill on the flash temporally uses all of the free space to do a large FF write and that does the equivalent of TRIM)
since android does not do any of that, after you use up 50% of the space, you lose some performance due to how data is stored in MLC flash, then after the equivalent of many GB's of writing (enough to dirty all of the NAND, then you get another slowdown.
Sadly no one has written a tool that does garbage collection on the NAND, and android does not seem too have any plans for improving flash management in the OS.
iOS also does not have any kind of TRIM or garbage collection, but the NAND that they use only loses around 40% of it's performance when dirty, while it is a noticable slowdown (which is why people who have had their 4s for a while will complain that it has gotten slow) it is not the major slowdown that you will get in a nexus 7 where most of the performance is lost by the time all of the nand is dirty (eg taking your write speeds from around 20MB/s to around 5MB/s.
With the push to lower cost tablets, android seriously needs to consider adding something to condition the flash memory either have it as handle process or something that happens when the device is charging. (remember cheaper flash is more reliant on TRIM (that is why if you get a cheap low end SSD and use it on a OS that does not have TRIM, you get horrible performance, the same is with tablets)
PS the NAND on the nexus 7 is faster than what you will find on many smartphones including ones made by apple, the problem is that the performance drops off significantly when the NAND becomes dirty.