With proper maintenance and careful monitoring, a computer does not have to
become slow and re-installation of the OS is very rarely "necessary". Most
chose to do it to compensate for their laziness and lack of house cleaning
and proper maintenance. I maintain a network of over 200 computers, and I
have never had to re-install the OS in a single one of them because they had
become "slow".
The Celeron (notice the correct spelling) is a budget chip, and is generally
included on budget computers that lack sufficient memory and hard drive
space, so they are more easily affected by bloat, and require closer
attention than a system with a more powerful processor, more RAM, and larger
hard drives.
The Celeron is the 4 cylinder 3 speed of the computer world, But as long as
there are consumers out there looking for the $300 computer bundle, there
will be Celerons. The old adage of "You get what you pay for" is
particularly applicable here.
Bobby