Why Do Web Site Visitors HATE Shockwave/Flash?

This is why:

 

This shows the activity monitor on my MacBookPro (2012 model). Look at the top line under %CPU.

The Firefox Plugin at the very top is Shockwave/Flash … Currently eating up more than one whole core in a dual-core processor (This slows things to a crawl and).

The site causing this  has something like 11 Flash windows auto-running … on top of a big HTML5 slider that causes motion sickness.

This is why one of the most popular add-ons for every browser is a Flash Killer. If you have valuable information in an  auto-running Flash window, many, many people will never, ever see it. Probably not what you want.