For me, this is no longer profitable because the market now has almost no huge delays. And also, the shipping costs will definitely experience a difference. But until now there are still many opportunities to do it, it's just not as big as it used to be.
I guess you are right because if we want to do arbitrage trading, we need to calculate many things, including the time to have confirmation from the network, how long the coin will arrive on the other exchange, and else. Besides that, we need to have a good internet connection, so when the coin gets confirmed, we can directly sell the coin at the price we want. We don't have to force ourselves to try arbitrage trading if the risk is not worth doing because that can make us lose the chance to sell the coin.