It has slow transactions and the fees are high, and it is the cryptocurrency frontier.
What do you think will realistically will take Bitcoins nr1 spot in the future? Bitcoin Cash maybe?

bitcoin was first, we can't forget about that. Also it is the most well known crypto and that is what matters in the ears of general public. We can be improving bitcoin forever, but it's not viable to change the cryptocurrency always when there is better blockchain than the one bitcoini soffering.