I use Ext Designer daily (latest version) and I find that it regularly crashes. This, I believe, is due to the size of my project file (around 1.7mb).
It wouldn't be so bad, but when crashing (especially during saving), it wipes out the entire project file (bringing it back to 0kb). Fortunately I have hourly backups, but still not desirable... it kinda puts fear in your heart every time you hit the save button
The product, otherwise, is awesome.
If something could be done to improve support for large files, that would be great.
Can you view how much memory XDS is using?
On Winblows, you can pull up the task manager and look under processes.
On Linux, run ps (consult your man page for the appropriate switches like "-aux"). Or, if you don't want to fiddle with it too much, try the "top" command.
I've seen XDS (aka Designer) get very sluggish or freeze up after about 1GB of memory usage. My home PC has 8GB of RAM with about 6GB open... So, memory isn't really the issue on my hardware. However, if your development platform is, say, a laptop with only 1GB of memory... then you can expect it to crash very quickly.
Perfection as a goal is a nice idea that can point one in a specific direction. However, since "perfection" is an ever changing (evolving?) and moving target, one must admit that perfection can never be obtained...