IMO, one of the points of emphasizing penetrating is the Chinese will necessarily disperse forces into the interior and operate from there, if they think its more survivable and defendable location. Obviously smaller VLO tactical tankers and a longer-range JASSM type weapon would be another dimension to obtaining the reach and to reduce penetration depth for those purposes. But regardless you will still want F-35 like sensor coverage into the mainland interior to provide data to joint platforms and weapon systems in near real time. Such is the paradigm. And perhaps a penetrating 5th-gen drone is the better option for that, as then you get the range, the endurance and the loitering and targeting.
In which case. the B-21 becomes the attacker with long-range VLO weapons.
In which case, the F-22A is probably not enough to support it as is, and it needs another type to provide F-22A capability, but with better legs.
In which case, a VLO drone tactical probe tanker would suffice to provide it for F-22A.
In which case, all you need is a deep ISR drone type, and a VLO tactical tanker type, to get results similar to "PCA"'s intended role, but on the B-21 delivery time table.
Not to mention that a VLO tactical probe tanker is a massive shot in the arm for the F-35A/B as well.
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From back in April:
Future of Air Tanking: The Perspective of the 86th Wing Commander04/11/2018
Robbin Laird
“The future of a large tanker will be to support more distributed and dispersed operations and we will be looking at small tactical refuelers providing fuel to tactical air combat assets – these tactical assets will likely be cheaper, unmanned and more expendable.
“That is where A3R comes in.
“I see an advantage in the automatic boom because it reduces the workload on the operator who in the future may be managing or controlling formations of UAV during AAR.
“As we learn to use this technology, it will be part of shaping the skill sets to transition to the next phase, of a large tanker replenishing smaller, automated tactical refuelers.”
Another aspect of change associated with KC-30A is part of the evolution within the battlespace as seen by Group Captain Pesce.
Namely, the proliferation of communications and sensor technology throughout the air combat force will include larger platforms such as C-17 and KC-30A, by including new SATCOM and other linkage technologies.
This is designed to support not only a dispersed force but also provide network redundancy in a disrupted and contested EM spectrum.https://sldinfo.com/2018/04/the-kc-30a- ... commander/
This is hinting at the exploration of a forwards tactical probe drone auto-tanking capability, with a secondary data relay function, in or very close to contested air (i.e. flying in and out of it, as required to tank forward jets and drones then refuel from a KC-30A once more). Given it's RAAF that's doing this exploration of the concept they're looking into using an auto-tanking probe drone system for forward F-35A servicing to keep KC-30As out of reach (of J20s) but give the F-35A the legs it needs.