Originally Posted by CliffordK

A good bike doesn't have to be a new 2020 model.
Perhaps a 2019 model?

You can certainly break 20 lbs without spending an arm and a leg.

I have intended to try to cut down to the 15 pound range, perhaps 14? And, may well build it up around a 20 year old frame.

Do you gain anything from the cutting edge technology? Probably. But, how much, and are they the right gains. So, a little over 100 miles... not short, but perhaps a good stiff frame from 10 years ago would suit you well for hills.