Bah.
I was contemplating upgrading the CPU in my desktop machine (currently a Core i3-540) and chucking a bit more RAM its way. Then I saw the price that LGA1156 CPUs go for these days - if you can find somewhere which still has any! So upgrading the CPU will mean upgrading the motherboard, and while my old DDR3-1333 RAM would "work", it'd probably be enough of a bottleneck to really mean I'd have to change that too. All I'd really be reusing would be the case, PSU, storage and (not-quite-so-ancient-but-still-old) graphics card.
I'm finally convinced that the idea of "futureproofing" a PC is a load of dingo's kidneys - while this stuff is all interchangeable in theory, in practice by the time you actually want to upgrade anything you can't.
I don't suppose any of you know a good source for NOS Intel processors? A cheap LGA1156 Core i5 or i7 would be lovely and would justify me slinging another 4gb of RAM at this thing too.