I think most sportsbetting gamblers and even online casino gamers are now shifting to the more accessible mobile phones and tablets using apps. Or you might be referring to the crypto betting market which is still mostly on web versions. I also prefer using laptop or pc when betting but I cannot deny that when I am busy and travelling I shift to using mobile phone because it is more convenient and light.
I am waiting for Match365 to accept more crypto currencies like ETH or the others.
You are right about convenience of mobile version. But the mobile version can never be a replacement for web version as there are some people prefer the web version to mobile version. A good website should provide all of options for its users.