The average of FAs will likely be closer to 60 at airlines if they do in worst case scenario furlough back ten years or more of hiring. I think the large WARN numbers that DL, UA, AA are putting out are meant to try to push the senior workers into retiring. I would not be surprised to see upgraded retirement offers going out over the next few months. They may say "final offer" but if they don't get enough takers for retirement or LOA something tells me they will keep upping the ante so they can get the senior employees on a path to being off the payroll.
There is a reason why at the big 4 voluntary retirements and LOAs are being prioritized over pay/benefit concessions. With all the aircraft being permanently retired and not replaced, overstaffing is likely long term without retirements. A furlough will happen eventually. A pay cut for example in the range of 15-25% still leaves the topped out senior dispatchers making much more than dispatchers with less than 10 years and well over 100K per year. The real longer term savings are when they have a payroll with more dispatchers who make less than 100K than having more who make greater than 100K.