I'm going to try to see if I could get a few extra gigs of RAM myself. Until then, I'm thinking when I get this expansion, plus Seasons, I will sacrifice all my SP's except for KPST, (can't live without that one!) and WA, AMB, and GEN for expansions, since those are the three I can do without.
I have to agree about Seasons being the last expansion. Sims 2 only had 8 expansions plus nine SP's, and the Sims franchise in general was always mostly appealed to and targeted to the casual gamers. I mean yeah, this is 2012, and you're always going to need to keep your PC up to par, especially since it's 2012, but realistically, it doesn't take much. Expansions and SP's will always require more, because they work in conjunction to the base game. So if you think about it, you're playing on 17 add ons total. I don't think the average PC could run that many for very long, especially with the open neighborhood. Even back in the old days, with the closed neighborhood, people on older, average pre-built PC's and laptops were left out in the cold with Seasons.