But since it got the update in 2007, and the next one that didn’t support it came out in 2009, then it basically was up to date for 3-4 years (2006-2009).. so it’s not like they dropped support in 2007
Okay, I thought when you said, "Now I’d consider the wait worth it only if the intel MBA won’t last me the 4 years (what I mean by that is receiving the new big system update every year ...," that you meant you wanted the major yearly OS updates like we get now (for example, macOS 10.13 High Sierra in 2017, macOS 10.14 Mojave in 2018, macOS 10.15 Catalina in 2019).