I gather that. But again obviously 100% performance isn't needed or he wouldn't be installing Win XP 64. My point was that Trim not saying it isn't awesome, just it isn't the end all be all of technologies that no machine can live without. A SSD spending most of it's life at 85-90% is still better then a HDD running at 100%. I get what you are saying about the GC being crap on most consumer drives, I have notated either in this thread or others that you want to get a drive with a known good GC and probably target the ones used in enterprise set ups where RAID/no Trim is expected.
The Amplification I haven't delved to much into, but even then I am not sure that is as big a problem as one would need to worry about. There is already proof that the NAND chips and wear leveling have made the drives last way longer then expected.
The big point is that TRIM does good work, but with a good drive, lessens the need for TRIM and would allow it to work well inside a machine without it, in which there are many. For a lot of people, putting on Win 7 also nearly doubles the cost of the upgrade.