That is a good question
Assuming that quality was on par with other drives (and I do believe it is) and the daily limit was somewhere between 20-30GB one shouldn't notice the throttling anyways and so the only reason to having that limiter was if the drive was used in the "wrong" environment, like e.g. servers.

I'd say that write throttling is OK as long as I don't get hit , I don't think I have, yet.
I've been hit by "steady-state" though on the 1XXX SF controller and depending on the number of drives the only option is cleaning.
(not really an issue with 3-4 drives but for 1-2 small drives like the 60GB the impact is huge, imho)

I'd like to have the option to select my own "life-curve" on the SF drives, I'd rather use the drives for 2-3 years with "unlimited" writes than being hindered by "life- preserving" limits that go beyond the useful life of the drive.
I'd say 2-3 years is sufficient for me, by that time there would be better alternatives with better performance, larger capacity,..., well most things improve over a 2-3 year period.
It does look like the SF-2XXX controller is way better than the 1XXX series and so those options may be obsolete, I'd still like that option for my ageing SF drives.

If they last 2x the Intels I'd just don't know what to use them for, if I can't use them while they are in their prime of their lives, whats the use?