I might just be more patient than you, but I spend more time waiting for imagery to come in from servers than I spend waiting for Josm (on a 5+ year old laptop with 2 GB or ram...).
Yeah, I was just trying to establish something like 'modest hardware works well enough for me'. I think Josm wouldn't work very well with any less ram (swap is an occasional pain point).
Do you think the style of interface presented by iD is more in the right direction? I don't mean the in-browser stuff, I mean the more simplified editing model and such.
I really can't say. UIs are something I might be able to judge after actually using them for a while. But as long as these editors freeze for seconds whenever I try to do anything, and crash with OOM after a dozen or two minutes, I just cannot get far enough to say anything about the UI and workflow.
On Windows with up to date Java it wants ~800 megabytes of virtual memory, but I never get out of memory crashes, just the occasional pause for swap (the pattern is very clearly swap).
(I'm not really trying to express an opinion on whether this is hoggish or not, just putting the numbers down)