The M4 isn't included because it's getting a little outdated. The old Intels also should be included in this poll if it's based on reliability.
Exactly. It certainly was the king of SSDs. It can't be argued though that it's a better drive than the 830 or 520.
If you catch one on sale, it's certainly a great drive.. previously the best drive on the market.
For me the SSD throne has gone as such-
Intel G1> Intel G2> Crucial M4>Samsung 830
It would be G1>G2>510>520 but the pricing is a little too high on the 510/520. Not that the others are cheap, they aren't bargain basement drives either.
Is the 510 more reliable than the M4? Yes. But that's not the only metric. They were/are priced too high considering the M4 is available. The drive was too capacity limited as well.
Same thing today, the 520 is probably the 'best' drive on the market, but once you consider the Samsung 830 is available they aren't the only game in town.
In the G1/G2 days, they were the only consistently fast, consistently reliable drive available. The competition from Crucial by the M4 era and Samsung 830 era put up quality competition.
I would probably vote for the Intel 510 or 520, taking into the account only "king of SSD's."
However, from a price per "kingliness" perspective, I would go with the crucial M4. They seem to be cheaper, plenty reliable, and have good performance, plus it seems they are VERY popular for a reason.
You could make a legitimate argument that Intel holds the throne since the beginning. I tend to lean towards Intel due to my good luck with them, but I pay homage to the M4 and 830. I completely see why they are popular.
