I recently upgrade to 12.8 basic and then installed the 12.8 developer suite on top of it as a 30 day trial.
I seem to run out of memory on a regular basis after working in it for an extended period of time, say 6 hours. Not a lot of complex TOAD stuff. Only 1-2 DB connections, several editor tabs open in one of the connections. Lots of compiling and saving in one tab. Frequent repetitive queries in the other tabs.
None of my other apps have issues at the same time as TOAD are having issues. When I hit the memory wall TOAD becomes unresponsive and I must use Task Manager to kill it.
Running Windows 7 SP 1 on a Dell 2,5GHZ i5-4300U, 4.0 GB RAM, 32-bit OS.