Yes, that happened more often than not.

Some people say that, yes... but the same people have been using the Internet for over 20 years... and apparently, they forgot how long it would take to download a single .png image, back in the 90's.

If being slow was a reason for a technology to fail, then almost all of them would have failed and we wouldn't have Internet by now. :-)

Blockchain is still an infant. It's only natural that it will get faster and faster in the future... and in a few years, maybe we'll be dealing with thousands of transactions per second, which will allow for systems like VISA and Mastercard to be replaced by Bitcoin, Monaco, TenX, etc...

I'm confident we'll get there.