Jtimothya makes a good point about the need to stay in business, we do want out great designers to stay in business. It does seem to me that there are some pretty good examples of "successful" companies with stable products, with evolutionary and incremental changes, forthe most part with an upgrade path for owners. Ralph would be one, but also true of folks like Ken Stevens of CAT, Bobby P at Merlin, and some Richard fella making time and phase coherent speakers out in California. Their products today don't look much different than their products 10, 15 years ago, and if you bought them then you (for the most part) could upgrade to their latest thinking. Great designs don't have to be reinvented every 2-3 years to remain relavant or have a loyal following.