Is it better to have both a tablet PC and a laptop?..

And what is the typical replacement cycle in years?
Damn... It feels like Korea is a society that only functions if you periodically replace your electronics.
It just increases the financial burden on ordinary people.
* I've been using my current laptop for 12 years, but people around me are advising me to just scrap it and get rid of it.
(Lenovo: the noise is no joke)