That's fair enough. But why does it need to be stealth? We already have stealth bombers. This is at least the fourth attempt to replace the B-52: XB-70 Valkyrie (cancelled), B-1 (cancelled), B-1b (in service), B-2. Each one was touted as replacement for the B-52, but each one was made too complex and expensive, which made it relatively cost effective to keep the B-52's going.
Not quite true.
The XB-70 was cancelled because the requirement for a high-altitude, high speed strategic bomber was obsoleted by the advent of missile technology--both SAMs and ICBMs.
The B-1 fell into the trap of not only solving the same problem as the XB-70, but also being promoted at a time when it was imagined that the B-2 would make all other bombers obsolete.
The B-1 was reinstated as the B-1B, which improved on the original design by increasing low-observability and by optimizing for low-altitude high-speed bombing. This was a niche not filled by ICBMs, nor by the B-2 (which by this point was properly understood to be a niche platform itself, not a single solution to every strategic bombing scenario).
It is even remotely possible for the government to keep the design simple enough and cheap enough to be an actual B-52 analogue? I mean something that is cheap and versatile while robust enough to be functional against mid-technological opponents, although perhaps less useful in the unlikely case we go to war in some situation where there is near technological parity.
Technology constantly gets cheaper and more accessible. Mid-tech opponents don't settle for 1990s mid-tech; they'll upgrade to 2020 mid-tech just as eagerly as the high-tech opponents upgrade to 2020 high-tech. An aircraft that handily defeats 1980s mid-tech will be useless against those same opponents in 2020.
A good bomber to use against 2020 mid-tech opponents will be cheap relative to 2020 high-tech bombers. It will have good low-observability characteristics and probably advanced electronic warfare suites. It will have much better data link integration, and it will probably be crew-optional. It will also probably be more versatile, capable of being pressed into a high-tech role where conditions permit or require.
I get that the B-52 is very, very old. I also think it is impossible to replace. Under the current political and procurement systems, we will end up with something that will be too complex and expensive. We have lost all ability to do simple and low cost.
Going forward, the simple and low cost bombers will almost certainly all be drones. And they will almost certainly be simple and low cost only relative to other systems of the same basic generation.
And I'm not sure that "simple and low cost" is the right metric anyway. For sure the world's air defense systems are not going to remain simple and low cost.
Only the dead have seen the end of war. For the rest of us, I'd say there's value in maintaining at least a small fleet of bombers capable of defeating the latest and greatest defenses, even if they have to be complex and expensive to do it. Indeed, the ability to field complex and expensive technologies is one of the US's greatest strategic advantages.