Would it just cost too much?
I can get a brand new lugged steel frame that would be perfect for my use -- a Surly Cross-Check. Seriously the only deterrent is a minor injury has forced me to re-think what my future needs are for geometry. I may need to adopt a more "comfort" posture. Better than not riding. Sucks to get old.
Despite my above comment, and thinking about it more, I want my next bike to be modern in the sense of accommodating fenders and much wider tires. I need horizontal dropouts and to be able to set the rear dropout spacing, to accommodate an internal gear hub (IGH).
Your comment is almost a decade out-of-date. Everyone these days has mostly converged on the same threaded BB standard for all but the highest-end bikes. Those press-fit BBs caused too many problems.
Meanwhile I damaged a thru-axle of a high-end big-name brand bike (rhymes with "wreck") I bought 2 years ago, and they told me that they no longer stock that part because it's "obsolete" (!)
A Cross Check with a flat or alt bar and 30 mm of spacers underneath? That or the Soma Doublecross without all the spacers. The main triangle and the fork are build from heat treated Tange Prestige tubes like some of the ATB frames of the '80s and '90s, unlike the Surlys which are built from utilitarian 4130 chromoly. Or the new Disc Trucker with extended head tube and the new Truck Stop riser drop bars. They shortened the chainstays and it no longer rides like barge unloaded, like the previous model.
https://somafab.blogspot.com/2020/10/soma-double-cross-signi...
https://bluelug.com/bike-catalog https://www.lafraisecycles.com/bikes
"they are welded, not brazed. [...] There are necked-down parts that fit into the top tube and down tube, like internal lugs."
i saved up and bought a titanium litespeed and it's fantastic (for me anyway). i think Lynskey is also great (they're the family that started litespeed, which they spun off to an american investor group, so basically bifurcated with two tennessee-made names for the same group of engineers.