True enough. We all learned that with ETH when Cryptokitties froze up the ETH network.
Its still a new technology and new advances are always being made.
Consider read more on the new Lightening Network, this is helping so much.
Hope this helps
Thanks, Lightening Network is great, and I did not raise number of transactions per minute as a question, because I think it's just a technical problem, and can be resolved through technics, which is not really a problem.