You make a good point EndUser but it is really an opinion that should be taken into consideration as it relates to your targeted audience. There are thousands of websites one would never see even if they surfed every day for the rest of thier lives so to say using a non flash based system would add "customers" to any website is really an opinion, not a statement of fact.
With Macromedia's Flex and Ego7's (among others) growing userbase for integrated flash enabled devices, which are being incorporated by very large corporate entities as viable platforms, I think these devices will grow in popularity.
Is Flash for everyone?....no. Is it perfect? Of course not, few things are. Is it a matter of choice? Very much so.