EVERY COMPANY YOU LISTED is an ID company 
Show me a
mass market company. SVS has definitely developed new drivers or new amps in the past within the lifespan of their product. A mass market company would release it as a new product and offer you nothing. SVS also sold it as an updated product, but offered those updates to existing customers when they were backwards compatible, though yes you have to pay shipping but you didn't have to send the old parts back. This happened at least 2-3 times for SVS, so no it wasn't a single instance
Sure it is a warranty basically, but it sure looks like a damn good one to me.
SONY did not cover my PS3 for a KNOWN DEFECT 3 years after I paid $600 for their product. I had to pay to get it repaired.