Those F 22s and F35s are just the front lines, those 800 F 15s and 1,000 F 16s will be around for decades while they work the kinks out of the F22 and F 35. The older iron are still among the most capable airplanes the world has ever seen.
Think thin black line of B-1s and B-2s, backed up by a couple hundred B-52’s, which have been in service since when, 1917 or so? Literally the grandchildren of the original pilots are flying them today!
The B-52 is projected to stay in service through at least 2040 when most of the airframes will be at least 80 years old.
They still have this stored at D-M for a last line of defense.
There are only 75 operational B-52’s left. The rest have been cut into pieces and sold for scrap.