United's minimums were 1000 turbine 11 years ago IIRC. But that was not the *competitive* minimum then or today (unless we're talking fighter time).
As others have said, no harm in applying but the reality is (assuming average white male) 1000 hours as an RJ FO 11 years ago is simply not going to get a call. There are folks who stayed at the regionals for the last 11 years, have 8,000 hours TPIC and still haven't been called.
The hiring wave has actually not even warmed up yet, so opportunities will improve over the next few years but I suspect that you will still need to be current and recent (ie some recent professional turbine flying) to get a major call. If you do some 91/135 turbine flying on the side, you might get a call from a LCC once the big three start really vacuuming up the regional pilots (they are already vacuuming up the mil pilots).
If you go back to the regionals, you would very likely have a Big-6 opportunity in a few years. Even an economic downturn will not stop the retirements, although hiring might slow. Nature of the industry, can't wish away all of the risk.
As somebody mentioned regionals pay better now, especially if you go somewhere with a fast upgrade and your life circumstances permit moving/commuting to junior reserve. That 1000 RJ hours means you can upgrade before all of the 121 noobs, but of course you'd remain junior in seat for a long time if you take that.