It all depends on what you want to do I guess !
I don't use a Amiga at the moment but I'd rather do too.
I'd like to use my PC as a server/FTP machine and have my Amiga connected thru that to the net.
But I imagine you cannot browse all sites with Amiga browsers.
You can still use Amiga's for many things - writing letters, painting & stuff. The Amiga is still a great games machine, although the kids of today might think it old fashioned.
People in 3rd-world countries use even older computers than the Amiga.
It's not the tool you are using - it is what you do with it. Most people who use PC's don't use 1/10th of the power (except when playing bloatware games). Most people could manage perfectly well on an Amiga if Micro$oft wasn't telling them otherwise.