Yes, you can use the flash installation on any drive if you really want to, this will save a ton of write cycles. The only disadvantage to doing so (depends on how you look at it) is that on a regular hard drive installation, you have swap (an unused swap file is a good swap file anyway) and your proxy cache (I have never seen very many positive hits per hour in several years) is on the hard drive, in a flash install it resides on the mounted ramdisk, with lots of memory and setting the flash at 50% you can certainly have a healthy size cache and it will be lightning fast as long as the machine remains running.
Proxy cache is not saved to the backup tarballs that get uncompressed when rebooting. These days I set my proxy cache to 0 and only use the proxy for filtering. The internet is too dynamic to get much use out of a proxy cache in my own use.
Marko it's been a while since I saw your avatar.
Sun Cobalt Raq4i AMD K6-III clocked at 550mhz LCD replaced with 16x2 Newhaven VFD and Rose Filter for white output.
Raqcop-2.0.6 Flash Raid 1 with Two Transcend Industrial CF Drives and Syba adapters.
Bridged Actiontec 702 ADSL 2+ Modem using Frontier ADSL complete with blocked port 25 in both directions, sigh....
Cisco 1231 Access Point with both radios, chosen SSID bordering on obscene. SSID never made it to Google maps.