The only point is that the 4k at it's current age is still a more reliable performer than the 5k has ever been for overall users.
To think of what age will do with the 5k is pretty scary.
The 1k was not the best built machine neither was the 2500 but they both seem to have proven to be more stable than the 5k.
One of the real problems with the 5k and understanding it's issues is that very few of us who purchased them new kept them.
They just quietly slipped them to another sucker, I mean owner.
Like I have said in other threads my 5k never crashed but plenty of others did.
I was fortunate enough to have a balanced screen whereas others had the white bright corner.
Potential 5k owners just have to understand that the software can be buggy, the hardware is suspect and Akai bailed on it with these things being known.
With all the MPC models out there that don't have the issues the 5k brings just makes it too easy to pick a better model.
People seem to be more aware of the 5k now, here's an example.
One of the local GCs had a clean loaded 5k for a $1000, They lowered it to $999, then $899.
After a few months they sent it to another local GC store and they lowered it to $799 then $699.
The eventually lowered it to $599 but it still didn't sell, they finally got someone to bite at $550.
That about 6 months trying to sell a clean, loaded 5k at prices far below typical asking prices.
If the 5k work problem free for someone then of course there is no reason not to use it but for most it's the other type of performance form the 5k.