Yes, the costs of using BTC are getting excessive. So much so that it is no longer practical to keep sending small amounts (< $5).

But this is a result of bitcoin being so popular and its value having risen so much in the last months. Also there's a lot of SPAM transactions going on, probably by miners in order to push everybody else to pay higher fees for their own profit.

But even then most technical users recognize that the solution taken by BCH is not the right one. Why? well because it is just a "kick the can" solution. It fixes things temporarily and it provides BCH users with a great experience (just like bitcoin had a few years ago) basically because no one is using it.

But that extra capacity doesn't come for free. If bitcoin did this, ALL nodes in the network would have their disk usage rate increased by a factor of 8, forever. The cost of that is that in the not so distant future almost nobody would be able to run a full node anymore and thus the number of nodes would decrease, leaving the network less and less decentralized. Remember that the whole value proposition of bitcoin rests on the fact that the network is decentralized enough to be resilient to attacks both from the outside as from the inside. So if we just allow the costs of running a node to increase 8 times faster, we'll probably end up with a network composed of nodes controlled by a cartel of powerful companies. This is a very dangerous scenario for bitcoin. Since it simplifies the work of governments that might want to control or censor it.

Instead of that, the bitcoin core team of developers actually just adopted another more carefully planned increase strategy that will eventually be equivalent to something close to 4x. This was already a compromise solution and one that actually opens the door to new off-chain scaling technologies.

Off-chain scaling can increase the system's capacity by orders of magnitude, not just simple 2, 4 or 8x. If you want to know more about it just google "lightning network". Beware however that it is a complex topic. Maybe that's the reason most people just dismiss it and tend to go to the simple kick-the-can solution like increasing the base block size.

Basically from my point of view Bitcoin Cash is an amateurish solution to a very complex problem. If adopted, their network will just keep on centralizing more and more (Some believe it is already very centralized). And if it actually gets a lot of traction it will inevitably face the same problem bitcoin is facing in a couple of years. The irony is that they'll be just fine if they fail to gain adoption, since they will remain much more usable than bitcoin.

The fork happened because the main community of BTC didn't want 8MB block sizes so they ended up forking to BCH.

I agree the BTC transaction fees are insane so we may start to see a shift to BCH.

One scenario is if the BTC community decides to fork to make transaction fees smaller, in turn killing BCH, because now mainstream BTC's transaction fees are cheap again.