Dan makes incredible backpacks and they're nearly custom. When I ordered mine back in the 1990s, I had to send a bunch of measurements to him. The backpack I got was masterfully built, will last three generations, and can haul 125 lbs or more.
That said, I think companies like Seek Outside are revolutionizing the industry. Exceedingly lightweight packs that are waterproof, can comfortably haul out elk quarters (I don't hunt), and,, in my opinion, are far more user friendly than any "backpacking" pack I've ever owned. Being a McHale backpack owner, that's saying something.
I'll never go back to an internal-frame pack again. An external offers too many options unavailable with an internal. Breakaway capability for starters. Moreover, the modern-day external-frame packs are not the flat, aluminum-tube externals from decades ago. My pack has 130L+ capacity, is fully waterproof without a cover, can carry whatever weight I can hope to haul, rolls down into a small bag to act as a day pack, yet weighs about 4.5 lbs including the extra pockets.