be calm
1) That same drives work on that same hardware under bootkamped windows
2) meet modern SSD speed:
Transfer Size 256MB, test area start
Iteration 1: writing
476MB/sec, reading
520MB/sec
Iteration 2: writing
482MB/sec, reading
515MB/sec
Iteration 3: writing
483MB/sec, reading
521MB/sec
Iteration 4: writing
480MB/sec, reading
516MB/sec
Iteration 5: writing
482MB/sec, reading
521MB/sec
and even 2009 Crucial C300 gives 360 on sata3 and 250-270 on sata2
3) HDD IS DEFINITELY user replaceable - it is clearly stated. And nowhere stated that I can't use modern SSDs in 2011 mbp. NOWHERE. Furthermore, C300 from 2009 also doesn't work in 2011 mbp - and same drive works in previous model
4) go read this for example:
https://forums.macrumors.com/posts/12616473/
5) I spent around 5 grand on setup - so _I_ am upset. For my new superfast working horse. And it just DOES NOT WORK AT ALL
6) where are at least software fallback to sata2 mode? as a little fast dirty fix for us, users, who are buying most powerful (read expensive) hardware? As a bit of respect?
7) There are NO SATA3 sams drives. And, BTW, there are also a "Apple" Hitachi SSD. And, furthermore, where exactly Apple stated that "Apple SSD" is Samsung and I should use Samsung?
So check your facts before go upset.