James, we don't know what happened to bootcut denim but we haven't worn a pair of bootcut jeans in a very, very long time. In fact, we were wondering if one could even buy a pair anymore and did a quick inventory of well-known retailers and their bootcut denim stock.
|Retailer||# of Jeans||# of Bootcut Jeans||%|
|Saks Fifth Avenue||215||24||11%|
Among these retailers, Barney's is the most forward-looking, so this data predicts that in a year or two wearing bootcut denim might exceed shiny square-toed shoes in unstylishness, and perhaps even become the equivalent of wearing Crocs.
As for your bunching dilemma, a proper straight jean is not tapered below the knee. Hence the name. If it is, then it loses it claim on the name and becomes a skinny or slim jean. We encourage you to avoid those as much (well, almost as much) as you avoid bootcut jeans.
If you're looking for a good straight leg jean, our all-time favorite fit is Adriano Goldschmeid's Protege. 17.5" at the knee, 17.5" at the leg opening. Perfect. Cut to the proper length, these won't bunch.