With other retirement and investments, enough. I don't plan on having a mortgage or any other large bills, so yes, enough. Unless, of course, Obama gets another two years unrestrained.
I certainly have a lot more than the zero rich was saying preferable to saving.
It's not really "multiple users simultaneously". We already had that (five full-duplex mobiles per base). This optionally splits one, or more, of these channels into a "listen-mostly" channel, with a push-to-talk on the "split" channel(s). Customers seem to like it. ;-) We have another fairly major announcement coming shortly, I think.