Well 4TB in 4 month is a lot, but not unrealistic, the computer I'm using now has run for about 2 years and I have 17TB writes, it is my work computer that run 10 hours a day and I'm a heavy user using serval virtuel machines on my computer.
But still you don't need to worry. SSDs last a lot longer than you think, this test
http://techreport.com/review/27909/the-ssd-endurance-experiment-theyre-all-dead show the SSDs to last about 1PB writes and the good ones lasted for 2,5PB the newner samsung 3dnand should last even longer.
But if you say the SSD will last for 1PB and one TB writes a month, like the guy you talk of, the SSD will still last for 41.7 years.
All this talk of fear of SSD durability is overrated